IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:27

27 January 2010
IAU Electronic Telegram No.2148


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SUPERNOVA 2009ll IN ESO 122-4
--------------------------------------------------------------------------------

M. Stritzinger, Las Campanas Observatory; G. Folatelli, Universidad de
Chile; and G. Pignata, Universidad Andres Bello, on behalf of the Millennium
Center for Supernova Science, report that they obtained an optical spectrum
of 2009ll (cf. CBET 2031) on Jan. 26.1 UT with the Gemini (+ GMOS) telescope.
The spectrum reveals that the object is a type-IIP supernova around two
months or more past explosion.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 January 27 (CBET 2148) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:28

28 January 2010
IAU Electronic Telegram No.2149


--------------------------------------------------------------------------------
SUPERNOVAE 2010O and 2010P
--------------------------------------------------------------------------------

S. Mattila, Tuorla Observatory; E. Kankare and J. Datson, Nordic
Optical Telescope; and A. Pastorello, Queen's University, Belfast, report
that they obtained low-resolution spectra of 2010O (cf. CBET 2144) and 2010P
(cf. CBET 2145) on Jan. 28.0 UT with the Nordic Optical Telescope (+ ALFOSC;
ranges 380-690 nm and 320-910 nm, respectively). The spectrum of 2010O shows
it to be a type-Ib supernova close to maximum light. The presence of
prominent narrow Na I D (588.995, 589.592 nm) absorption lines from the host
galaxy indicates a significant reddening of E(B-V) about 0.6, according to the
relation of Turatto et al. (2002, http://lanl.arxiv.org/abs/astro-ph/0211219).
Comparison of the dereddened spectrum of 2010O with a library of supernova
spectra using the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383)
yields a best match with the spectra of the type-Ib/c supernova 2002ji and the
type-Ib supernova 2005bf around maximum light. The low-signal-to-noise
spectrum of 2010P shows an extremely red continuum that is a signature of a
high extinction (cf. CBET 2145); no clear spectral lines are visible, with the
exception of the Ca II infrared triplet that confirms the supernova nature of
2010P.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 January 28 (CBET 2149) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:28

29 January 2010
IAU Electronic Telegram No.2150


--------------------------------------------------------------------------------
SUPERNOVAE 2010Q, 2010R, AND 2010S
--------------------------------------------------------------------------------

Further to CBET 2138, M. J. Graham, A. J. Drake, S. G. Djorgovski, A.
Mahabal, and R. Williams, California Institute of Technology; J. L. Prieto,
Carnegie Observatories; M. Catelan, Pontificia Universidad Catolica de Chile;
E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of
Arizona; and E. Christensen, Gemini Observatory, report the CRTS discovery of
additional supernovae in unfiltered CSS images:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010Q Jan. 15.40 10 26 27.11 +39 01 50.9 19.2 1" west
2010R Jan. 15.45 12 17 10.49 +25 39 58.7 18.3 1" west
2010S Jan. 16.12 1 39 04.48 + 0 37 12.2 18.4 --

Further CSS magnitudes for 2010Q: 2009 May 24.22, [20.4; Dec. 18.41, 19.9.
Further CSS magnitudes for 2010R: 2009 June 22.22, [19.3. Further CSS
magnitudes for 2010S: 2009 Dec. 15.18, [20.8.
Spectrograms (range 390-700 nm) were obtained with the Palomar 5-m
reflector (+ DBSP) on Jan. 17 UT. Cross-correlation with a library of
supernova spectra using the "SuperNova IDentification" code (Blondin and
Tonry 2007, Ap.J. 666, 1024) shows 2010S to be most similar to the type-Ic
supernova 1997ef at two weeks before maximum light. SN 2010Q is most
similar to the type-Ic supernova 1990B near maximum; clear, narrow H_alpha,
H_beta, and O III emission lines from the host galaxy are seen in the
spectrum at z = 0.055. SN 2010R is most similar to the the type-Ia
supernova 1994S near maximum light; clear, narrow H_alpha, H_beta, and O III
emission lines from the host galaxy are seen in the spectrum at z = 0.078.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 January 29 (CBET 2150) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:29

29 January 2010
IAU Electronic Telegram No.2151


--------------------------------------------------------------------------------
SUPERNOVAE 2010Q, 2010R, AND 2010S
--------------------------------------------------------------------------------

[Editor's note: this text replaces that on CBET 2150 (revised
position for 2010S)]
Further to CBET 2138, M. J. Graham, A. J. Drake, S. G. Djorgovski, A.
Mahabal, and R. Williams, California Institute of Technology; J. L. Prieto,
Carnegie Observatories; M. Catelan, Pontificia Universidad Catolica de Chile;
E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of
Arizona; and E. Christensen, Gemini Observatory, report the CRTS discovery of
additional supernovae in unfiltered CSS images:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010Q Jan. 15.40 10 26 27.11 +39 01 50.9 19.2 1" west
2010R Jan. 15.45 12 17 10.49 +25 39 58.7 18.3 1" west
2010S Jan. 16.12 1 39 04.48 - 0 37 12.2 18.4 --

Further CSS magnitudes for 2010Q: 2009 May 24.22, [20.4; Dec. 18.41, 19.9.
Further CSS magnitudes for 2010R: 2009 June 22.22, [19.3. Further CSS
magnitudes for 2010S: 2009 Dec. 15.18, [20.8.
Spectrograms (range 390-700 nm) were obtained with the Palomar 5-m
reflector (+ DBSP) on Jan. 17 UT. Cross-correlation with a library of
supernova spectra using the "SuperNova IDentification" code (Blondin and
Tonry 2007, Ap.J. 666, 1024) shows 2010S to be most similar to the type-Ic
supernova 1997ef at two weeks before maximum light. SN 2010Q is most
similar to the type-Ic supernova 1990B near maximum; clear, narrow H_alpha,
H_beta, and O III emission lines from the host galaxy are seen in the
spectrum at z = 0.055. SN 2010R is most similar to the the type-Ia
supernova 1994S near maximum light; clear, narrow H_alpha, H_beta, and O III
emission lines from the host galaxy are seen in the spectrum at z = 0.078.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:29

29 January 2010
IAU Electronic Telegram No.2152


--------------------------------------------------------------------------------
U SCORPII
--------------------------------------------------------------------------------

A. Arai, Kyoto Sangyo University; and M. Yamanaka, M. Sasada, and R.
Itoh, Hiroshima University, report that they obtained low-resolution optical
spectroscopy (resolution 600) of U Sco (cf. IAUC 9111) on Jan. 28.81 UT at
Higashi-Hiroshima Observatory. The spectrum shows strong emissions of
H-alpha, H-beta, Fe II lines, and O I (777.4 and 844.6 nm) lines. The
H-alpha and H-beta emissions are broadened with FWZI roughly 11000 km/s.
The H-alpha emission line clearly shows a triple-peaked shape. These spectral
features are like the nature of those seen during the previous two outbursts
of U Sco in 1979 and 1999.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 January 29 (CBET 2152) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:29

29 January 2010
IAU Electronic Telegram No.2153


--------------------------------------------------------------------------------
U SCORPII
--------------------------------------------------------------------------------

N. M. Ashok, R. K. Das, and D. P. K. Banerjee, Physical Research
Laboratory (PRL), Navrangpura, Ahmedabad, report near-infrared J-, H-, and
K-band spectroscopy (range 1.08-2.35 microns) with the Mt. Abu 1.2-m telescope
(+ PRL Near Infrared NICMOS3 Imaging Spectrometer) of the current outburst of
the recurrent nova U Sco (cf. IAUC 9111; CBET 2152). The spectra, taken on
Jan. 28.993 UT with modest signal-to-noise ratio, show H I emission lines of
Paschen-beta and Paschen-gamma in the J band, Brackett gamma in the K band,
and other Brackett lines in the H band. The O I line at 1.1288 microns is
also seen, along with a weaker line at 1.2465 microns that is possibly due
to N I. He I lines at 1.0830 (blended with Paschen-gamma) and 2.0581 microns
are present. The H I, He I, and O I lines show considerable structure at
the peaks and are all broad, with typical FWZI values of about 10000 km/s.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:30

29 January 2010
IAU Electronic Telegram No.2154


--------------------------------------------------------------------------------
APPARENT NOVA IN M31: M31N 2010-01c
--------------------------------------------------------------------------------

Koichi Nishiyama (Kurume, Fukuoka-ken, Japan) and Fujio Kabashima
(Miyaki-cho, Saga-ken, Japan) report the discovery of an apparent nova (mag
17.2) in M31 on six 40-s unfiltered CCD frames (limiting magnitude 19.0)
taken around Jan. 28.437 UT using a Meade 200R 0.40-m f/9.8 reflector (+ SBIG
STL1001E camera). The new object is located at R.A. = 0h43m20s.28, Decl. =
+40d58'30".2 (equinox 2000.0), which is 405" east and 1058" south of the
center of the galaxy M31. Nothing is visible at this position on the
Digitized Sky Survey red and infrared plates. Additional magnitudes from
Nishiyama and Kabashima for M31N 2010-01c: 2010 Jan. 24.433, [19.4; 26.438,
19.0 (limiting mag 19.5).
K. Hornoch, Astronomical Institute, Ondrejov, Czech Republic, reports
that he was able to confirm the presence of this apparent nova on a 180-s
R-band CCD frame taken by P. Kubanek, N. Morales, J. L. Ortiz, J. Gorosabel,
and M. Jelinek with the 1.23-m telescope at Calar Alto on Jan. 29.821 UT,
yielding magnitude R = 16.8 +/- 0.1 and position end figures 20s.31, 30".1
(offset 407" east and 1058" south of the center of M31).

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 January 29 (CBET 2154) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:30

29 January 2010
IAU Electronic Telegram No.2155


--------------------------------------------------------------------------------
COMET 17P/HOLMES
--------------------------------------------------------------------------------

Z. Sekanina, Jet Propulsion Laboratory, calls attention to the need
for monitoring this comet's integrated brightness as a measure of activity
between now and the next return to the sun in 2014. Sudden, unpredictable
flare-ups are not ruled out following the enormous explosion in October 2007.
At present, the comet is favorably placed for observation until June 2010, and
then again from December 2010 to July 2011, from January to August 2012, and
from February to October 2013. Except for a few months around conjunctions
with the sun, the comet should be observable throughout the orbit and never
fainter than visual magnitude 24.5. Currently, its brightness is expected to
be between 19 and 23.5.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 January 29 (CBET 2155) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:31

30 January 2010
IAU Electronic Telegram No.2156


--------------------------------------------------------------------------------
SUPERNOVA 2009ny
--------------------------------------------------------------------------------

Further to CBET 2151, E. Christensen, Gemini Observatory; A. J. Drake,
S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams, California
Institute of Technology; J. L. Prieto, Carnegie Observatories; M. Catelan,
Pontificia Universidad Catolica de Chile; and E. C. Beshore and S. M. Larson,
Lunar and Planetary Laboratory, University of Arizona, report the CRTS
discovery of a supernova in unfiltered Catalina Sky Survey (CSS) images.

SN 2009 UT R.A. (2000.0) Decl. Mag.
2009ny Oct. 20.14 22 11 23.59 - 9 12 44.4 18.2

Further CSS magnitudes for 2009ny: 2009 Sept. 27.17, [20.8; Oct. 9.18, 19.7;
Nov. 11.11, 19.6; Dec. 19.07, [20.0. The supernova matches the location of
a 23rd-magnitude object detected in a number of VR-filter images taken via
the NOAO Deep Wide Field Survey from 2000 to 2003. A confirming spectrogram
(range 500-870 nm) was obtained using the Gemini South 8-m telescope (+ GMOS)
on Nov. 8 UT. Cross-correlation with a library of supernova spectra using
the "SuperNova IDentification" code (Blondin and Tonry 2007, Ap.J. 666, 1024)
shows the best match for 2009ny to be with the type-Ib supernova 1999di at
one month past maximum light at redshift z = 0.057. However, the spectral
lines are clearly weaker than the closest SNID match, and the photometry
suggests that the event was near two weeks past maximum.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 January 30 (CBET 2156) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:31

30 January 2010
IAU Electronic Telegram No.2157


--------------------------------------------------------------------------------
U SCORPII
--------------------------------------------------------------------------------

Further to CBET 2153, R. K. Das, D. P. K. Banerjee, and N. M. Ashok,
Physical Research Laboratory, Ahmedabad, report additional near-infrared J-,
H-, and K-band spectroscopy and photometric observations of U Sco using the
Mt. Abu 1.2-m telescope (+ NICMOS3 Imaging Spectrometer). Magnitudes for
U Sco on Jan. 28.9 UT: J = 6.99, H = 6.72, K = 6.32 (with typical errors of
0.03 magnitude). Subsequent to the spectroscopy reported on CBET 2153, JHK
spectra were also obtained on Jan. 29.98, showing that the H I and He I lines
have strengthened in terms of the peak-to-continuum ratio. No significant
change is seen in the FWZI of the lines from their earlier reported value of
10000 km/s. However, the peaks of the the H I lines (Paschen-beta and
Brackett-gamma) have become considerably flatter, and the triple-peaked
structure seen earlier (CBETs 2152, 2153) is not prominent now.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 January 30 (CBET 2157) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:32

31 January 2010
IAU Electronic Telegram No.2158


--------------------------------------------------------------------------------
SUPERNOVA 2009mg IN ESO 121-G26
--------------------------------------------------------------------------------

M. Stritzinger, Carnegie Observatories, reports that three spectra of SN
2009mg (cf. CBET 2071, 2077), obtained with the Gemini South Telescope (+
GMOS) on Jan. 6.2, 7.2, and 18.2 UT, reveal that this object was misclassified
for a second time on CBET 2093 by Roming et al. SN 2006mg is clearly a normal
type-IIb event and not a broad-line type-Ic supernova. Comparison with a
library of supernova spectra (Blondin and Tonry 2007, Ap.J. 666, 1024)
suggests that this object is most similiar to supernovae 1996cb and 1993J.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 January 31 (CBET 2158) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:32

7 January 2010
IAU Circular No.9104


--------------------------------------------------------------------------------
COMET C/2010 A1 (HILL)
--------------------------------------------------------------------------------

R. E. Hill, Lunar and Planetary Laboratory, reports his
discovery of a comet on CCD images taken with the Catalina 0.68-m
Schmidt reflector (discovery observation tabulated below),
describing the object from co-added exposures in 2"-4" seeing as
having a nuclear condensation about 4"-5" across with a 12"-15"-
radius coma beyond that and no obvious tail (but a slight east-west
elongation) in moonlight; his follow-up images in thin haze on Jan.
7.24-7.25 UT show a similar appearance but with a short, fan-shaped
tail 20"-30" long in p.a. about 270 deg. Four co-added images
obtained by E. C. Beshore with the Mt. Lemmon 1.5-m reflector on
Jan. 6.5 showed a very faint tail perhaps 15" long in p.a. 270 deg.
Following posting on the Minor Planet Center's 'NEOCP' webpage,
other CCD astrometrists have noted the object's cometary appearance.
Y. Ikari (Moriyama, Shiga-Ken, Japan, 0.26-m f/7 reflector, Jan.
6.6) measured a coma diameter of 0'.2. P. Birtwhistle (Great
Shefford, Berkshire, England, 0.40-m f/6 Schmidt-Cassegrain
reflector, Jan. 7.1) found a diffuse coma of size 15" x 22",
elongated in p.a. 310 deg, with a weak condensation offset to the
southeast (the brightest part of the surrounding coma is 6" x 12"
and extends in p.a. 50 deg and 230 deg). H. Sato (Ota-ku, Tokyo,
Japan, remotely using a 0.25-m f/3.4 reflector of the RAS
Observatory, near Mayhill, NM, U.S.A., Jan. 7.2) finds a 20" coma
elongated toward p.a. 110 deg. W. H. Ryan (Magdalena Ridge
Observatory, 2.4-m f/8.9 reflector, Jan. 7.3) remarked on a
distinct coma.

2010 UT R.A. (2000) Decl. Mag. Observer
Jan. 6.46381 9 11 26.44 +33 08 34.6 17.6 Hill

Further astrometry, the following preliminary parabolic orbital
elements, and an ephemeris are given on MPEC 2010-A31. It is
possible that the comet is of short period.

T = 2010 June 24.055 TT Peri. = 219.047
Node = 6.140 2000.0
q = 1.02031 AU Incl. = 11.782

--------------------------------------------------------------------------------
COMET 81P/WILD
--------------------------------------------------------------------------------

Visual total-magnitude estimates: Nov. 24.17 UT, 10.5 (J. J.
Gonzalez, Leon, Spain, 20-cm reflector); Dec. 12.16, 10.3 (Gonzalez);
29.21, 10.3 (M. Meyer, Limburg, Germany, 15-cm refractor).

2010 January 7 (9104) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:33

7 January 2010
IAU Circular No.9105


--------------------------------------------------------------------------------
COMET P/2010 A2 (LINEAR)
--------------------------------------------------------------------------------

An apparently asteroidal object reported by the LINEAR project
(discovery observation tabulated below) and placed on the NEO
Confirmation Page has been reported as cometary and difficult to
measure by several CCD astrometrists. P. Birtwhistle (Great
Shefford, Berkshire, England, 0.40-m f/6 Schmidt-Cassegrain
reflector, Jan. 7.0) found the object to be a headless comet with a
straight tail in individual 20-s exposures (in a 2600-s integration,
the tail has a length of at least 130" in p.a. 280 deg and a width
of 10"-14" along its entire length -- brightest in a 20" area
starting 6" from the eastern end, fading gradually to the west);
there is no obvious central condensation, but the center of
brightness may be approximately 11" from the eastern end, and the
positional measurement was very difficult. On images obtained
during Jan. 7.84-7.87, Birtwhistle found a similar appearance to
the previous night but found the tail to be at least 260" long in
p.a. 279 deg. W. H. Ryan (Magdalena Ridge Observatory, 2.4-m f/8.9
reflector, Jan. 7.20-7.29) reports an ill-defined elongated nuclear
condensation and a very distinct, bright tail in p.a. about 280 deg.
H. Sato (Ota-ku, Tokyo, Japan, remotely using a 0.25-m f/3.4
reflector of the RAS Observatory, near Mayhill, NM, U.S.A., Jan.
7.2) notes a very diffuse coma 10" in diameter and a 2'.2 tail
toward p.a. 280 deg. On Jan. 7.3, E. C. Beshore (Mt. Lemmon Survey,
1.5-m reflector) followed the tail out to nearly 4' in p.a. 285 deg.
K. Kadota (Ageo, Saitama-ken, Japan, 0.25-m f/5 reflector, Jan. 7.7)
found the comet to be diffuse, with a weak central condensation and
a faint coma of diameter 0'.5, showing a straight, narrow tail 5'
long in p.a. 280 deg.

2010 UT R.A. (2000) Decl. Mag. Observer
Jan. 6.27428 7 10 16.81 +28 21 35.1 19.9 LINEAR

Further astrometry, the following very preliminary elliptical
orbital elements, and an ephemeris are given on MPEC 2010-A32.

T = 2010 May 7.565 TT Peri. = 227.300
e = 0.63483 Node = 313.525 2000.0
q = 1.35759 AU Incl. = 6.068
a = 3.71766 AU n = 0.137499 P = 7.17 years

--------------------------------------------------------------------------------
COMET C/2007 Q3 (SIDING SPRING)
--------------------------------------------------------------------------------

Visual total-magnitude estimates by M. Meyer, Limburg, Germany
(15-cm refractor): Dec. 21.19 UT, 9.7; 26.21, 9.7; 29.20, 9.6.

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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:46

9 January 2010
IAU Circular No.9106


--------------------------------------------------------------------------------
COMET C/2010 A3 (HILL)
--------------------------------------------------------------------------------

R. E. Hill reports his discovery of another comet with the
Catalina 0.68-m Schmidt telescope (discovery observation tabulated
below); four co-added 30-s CCD exposures show a well-condensed
nuclear condensation 4"-5" across with a possible 2" coma beyond
that and a broad, diffuse tail 10"-15" long in p.a. 80 deg. Four
follow-up co-added 30-s CCD exposures by A. Boattini with the Mt.
Lemmon 1.5-m reflector on Jan. 8.16-8.17 show a well-condensed
comet with a coma about 5"-6" wide and a broad, fan-shaped tail
about 15" long in p.a. 75 deg. Following posting on the Minor
Planet Center's 'NEOCP' webpage, other CCD astrometrists have also
noted the object's cometary appearance. A. Novichonok, Kondopoga,
Russia, reports that five stacked 300-s images taken remotely by T.
Kryachko with the 0.3-m f/8 Astrotel reflector at Zelenchukskaya
Station on Jan. 8.7 UT show a round, diffuse coma of diameter 10"
and a wide, faint 15" tail in p.a. 280 deg. H. Sato (Ota-ku,
Tokyo, Japan, remotely using an RAS Observatory 0.25-m f/3.4
reflector near Mayhill, NM, U.S.A.; Jan. 9.1 UT) finds a 10" coma
elongated toward p.a. 95 deg. W. H. Ryan (Magdalena Ridge
Observatory, 2.4-m f/8.9 reflector; Jan. 9.12-9.15) notes a coma
and a faint tail in p.a. about 80 deg on R-band images. E. Guido
(Castellammare di Stabia, Italy) reports that he and G. Sostero
co-added eighteen 120-s unfiltered exposures taken remotely as
done by Sato (above) on Jan. 9.14-9.16, showing a coma nearly 10"
in diameter, slightly elongated toward p.a. 50 deg. K. Kadota
(Ageo, Saitama-ken, Japan, 0.25-m f/5 reflector; Jan. 9.5) reports
the comet to be diffuse with central condensation, with a coma
diameter of 0'.4 and a faint tail 1'.5 long in p.a. 80 deg.

2010 UT R.A. (2000) Decl. Mag. Observer
Jan. 8.09596 1 44 01.92 + 8 13 15.6 17.3 Hill

The available astrometry, the following preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2010-A48.

T = 2010 Mar. 27.292 TT Peri. = 38.455
Node = 63.847 2000.0
q = 1.65798 AU Incl. = 15.064

--------------------------------------------------------------------------------
COMET 217P/2009 F3 (LINEAR)
--------------------------------------------------------------------------------

Visual total-magnitude estimates by M. Goiato (Aracatuba,
Brazil, 22-cm reflector): Nov. 13.12 UT, 10.6; Dec. 6.06, 10.9:;
18.21, 12.1.

2010 January 9 (9106) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:47

14 January 2010
IAU Circular No.9107


--------------------------------------------------------------------------------
COMET C/2010 A4 (SIDING SPRING)
--------------------------------------------------------------------------------

On Jan. 12, G. J. Garradd reported his discovery of an
apparently asteroidal object on CCD images taken with the 0.5-m
Uppsala Schmidt telescope (discovery observation tabulated below);
after posting on the Minor Planet Center's 'NEOCP' webpage, Garradd
later reported the object being elongated about 10" in p.a. 150 deg
but with no clear tail in four 60-s stacked exposures. Other CCD
astrometrists have also commented on the object's cometary
appearance, including W. H. Ryan (Magdalena Ridge Observatory,
2.4-m f/8.9 reflector, Jan. 13.35-13.38 UT), who noted a tail in
p.a. about 325 deg in R-band images. E. Guido, Castellammare di
Stabia, Italy, reports that twenty co-added 120-s unfiltered
exposures taken by G. Sostero and himself remotely with a 0.25-m
f/3.4 reflector located near Mayhill, NM, U.S.A., on Jan. 13.4 show
a diffuse coma nearly 8" in diameter with a very weak central
condensation. S. Foglia writes that thirty stacked 60-s images
taken by R. Holmes (Ashmore, IL, U.S.A., 0.61-m reflector, Jan.
13.5) show the object to be diffuse.

2010 UT R.A. (2000) Decl. Mag. Observer
Jan. 12.72144 11 02 04.71 -27 10 15.5 18.7 Garradd

Further astrometry, the following preliminary parabolic orbital
elements, and an ephemeris are given on MPEC 2010-A76.

T = 2010 Oct. 8.813 TT Peri. = 272.446
Node = 346.731 2000.0
q = 2.70743 AU Incl. = 96.846

--------------------------------------------------------------------------------
COMET P/2010 A1 (HILL)
--------------------------------------------------------------------------------

Additional astrometry has show this comet (cf. IAUC 9104)
to be of short period; elements from MPEC 2010-A50:

T = 2009 Aug. 9.353 TT Peri. = 13.869
e = 0.55136 Node = 47.080 2000.0
q = 1.94218 AU Incl. = 10.265
a = 4.32903 AU n = 0.109426 P = 9.01 years

2010 January 14 (9107) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:48

16 January 2010
IAU Circular No.9108


--------------------------------------------------------------------------------
COMET P/2010 A5 (LINEAR)
--------------------------------------------------------------------------------

An apparently asteroidal object reported by the LINEAR project
(discovery observation tabulated below) and placed on the Minor
Planet Center's 'NEOCP' webpage has been reported as cometary by
other CCD astrometrists. R. Ligustri (Udine, Italy, remotely using
a 0.32-m f/9 reflector at RAS Observatory, Moorook, Australia; Jan.
15.7 UT) writes that 24 stacked 60-s image show a coma of size
about 20". L. Buzzi (Varese, Italy, 0.60-m reflector; Jan. 16.2)
reports that stacked images totalling 15 min of exposure time
obtained in good seeing show a compact coma elongated in p.a. 300
deg, with a tail visible in that direction for at least 20". K.
Sarneczky (Konkoly Observatory, 1.02-m Ritchey-Chretien telescope;
Jan. 16.2) notes that a 120-s co-added image shows a 25"-long fan-
shaped tail in p.a. 290 deg. E. Guido and G. Sostero (remotely
using a 0.25-m reflector near Mayhill, NM, U.S.A.; Jan. 16.4) write
that fifteen co-added 120-s exposures show a diffuse coma nearly
12" in diameter, elongated about 20" in p.a. 300 deg. W. H. Ryan
(Magdalena Ridge Observatory, 2.4-m reflector; Jan. 16.5) reports
that R-band exposures taken by E. V. Ryan and himself show a coma
with a tail in p.a. about 280 deg. H. Sato (Ota-ku, Tokyo, Japan,
remotely using a 0.25-m reflector at RAS Observatory, near Mayhill,
NM; Jan. 16.5) finds a 10" coma elongated toward p.a. 240 deg. S.
Foglia (using a 0.18-m reflector at Tzec Maun Observatory,
Cloudcroft, NM, U.S.A., with P. Concari, G. Galli, and M. Tombelli;
Jan. 16.5) reports that eight stacked 120-s images show the object
to be diffuse with mag about 17.1.

2010 UT R.A. (2000) Decl. Mag. Observer
Jan. 14.45298 13 26 02.76 -15 55 53.3 17.7 LINEAR

Further astrometry, the following preliminary elliptical orbital
elements, and an ephemeris are given on MPEC 2010-B02.

T = 2010 Apr. 20.601 TT Peri. = 307.527
e = 0.67268 Node = 278.071 2000.0
q = 1.70451 AU Incl. = 5.789
a = 5.20739 AU n = 0.082942 P = 11.9 years

--------------------------------------------------------------------------------
COMET P/2010 A3 (HILL)
--------------------------------------------------------------------------------

Elliptical orbital elements from MPEC 2010-A85 for epoch 2010
Mar. 25.0 TT: T = 2010 Apr. 3.6804 TT, e = 0.732116, q = 1.621774
AU, i = 15.0270 deg, Peri. = 41.2825 deg, Node = 64.8307 deg
(equinox 2000.0), P = 14.9 years.

2010 January 16 (9108) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:48

19 January 2010
IAU Circular No.9109


--------------------------------------------------------------------------------
COMET P/2010 A2 (LINEAR)
--------------------------------------------------------------------------------

Further to IAUC 9105, the following improved orbital elements
(from MPEC 2010-A78) for this comet are like those of a minor
planet in the inner part of the main belt: T = 2009 Nov. 17.248 TT,
q = 1.97580 AU, e = 0.13178, Peri. = 125.600 deg, Node = 321.073
deg, i = 5.099 deg (equinox 2000.0), P = 3.43 years.
J. V. Scotti, Lunar and Planetary Laboratory, reports that
there is no distinct nuclear condensation on CCD images of this
comet taken by R. S. McMillan with the Spacewatch 1.8-m f/2.7
reflector on Jan. 8.2 and 12.4 UT; on Jan. 8, the coma size was
about 8" x 11", with a sharper edge on the northern boundary, and a
long, narrow tail at least 4'.6 long in p.a. 279 deg; a faint spike
extended 0'.34 in p.a. 137 deg.
D. Jewitt, University of California at Los Angeles; and J.
Annis and M. Soares-Santos, Fermilab, report observations of P/2010
A2 from Jan. 11 and 12 UT with the WYNN 3.5-m telescope on Kitt
Peak. The object appears as a point-like body of red mag 23.0 +/-
0.5 located 2".5 +/- 0".5 east of the apex of a broad, low-surface-
brightness dust tail; the latter lacks strong condensation and is
more than 5' in length (see website URL
http://www2.ess.ucla.edu/~jewitt/MBC5.html). The detected nucleus
is approximately 150-200 m in diameter (assuming albedo 0.1),
connected to the tail by an unresolved light bridge. With
semimajor axis less than Jupiter's, and Tisserand parameter 3.6,
P/2010 A2 is the fifth recognized example of a main-belt comet (MBC),
differing from other MBCs in being an inner-belt object (orbit
consistent with membership in the Flora family). The location of
the nucleus outside the tail suggests a recent impulsive origin for
P/2010 A2, perhaps from a recent collision between two previously
unseen minor planets, with radiation pressure driving the
separation between the nucleus and the tail. In this scenario, the
bridge consists of large impact-produced particles slowly
separating from the nucleus under radiation pressure and Kepler
shear. Future observations are encouraged to test this hypothesis.
J. Licandro, Instituto de Astrofisica de Canarias; G. P. Tozzi,
Istituto Nazionale di Astrofisica, Arcetri; and T. Liimets, Nordic
Optical Telescope (NOT) and Tatru Observatory, report that 5-min R-
and V-band exposures obtained on Jan. 14.945-14.985 UT with the
2.5-m NOT (+ ALFOSC) shows the presence of an asteroidal object 2"
east of (and moving at the same rate as) the uncondensed "dust
swarm" of P/2010 A2, which itself is 4' long (177000 km at the
comet's distance) and about 5" wide in p.a. 277 deg. Similar
reports of the comet's appearance have been received from other
observers, including R. Haver and L. Buzzi.

2010 January 19 (9109) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:49

25 January 2010
IAU Circular No.9110


--------------------------------------------------------------------------------
NOTICE TO SUBSCRIBERS
--------------------------------------------------------------------------------

N. Brickhouse and C. Alcock, Smithsonian Astrophysical
Observatory (SAO), write: "As of 2010 Feb. 1, the SAO will no
longer be hosting the Central Bureau for Astronomical Telegrams
(CBAT) for the International Astronomical Union (IAU) because SAO
has been unable to obtain sufficient funding to sustain the CBAT
financially. The CBAT is working, with the support of the IAU, on
a transition to a new sponsoring institution. As of this
announcement, SAO will not accept new subscription money and
expects that the CBAT will announce soon the revised arrangements
for subscription payments. During the interim period, SAO will
not be able to accept subscriptions."

--------------------------------------------------------------------------------
EDITORIAL NOTICE
--------------------------------------------------------------------------------

The IAU, through its General Secretary, confirms that the CBAT
will continue to operate with the undersigned as Director and that
every effort is being made to ensure no disruption of the CBAT's
activities during the transition to its new home. Correspondence
now can be sent to the Director via e-mail to
dwe_green@eps.harvard.edu and via postal mail to: Dr. D. W. E.
Green; Room 209; Department of Earth and Planetary Sciences;
Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A.

--------------------------------------------------------------------------------
COMET P/2010 A2 (LINEAR)
--------------------------------------------------------------------------------

Z. Sekanina, Jet Propulsion Laboratory, writes that the
orientations of the tail of this comet reported from the
observations made between Jan. 7 and 16 (IAUC 9105, 9109; CBET 2134)
suggest its formation between January and August 2009. Because of
the edge-on projection (with the earth only 2 to 3 degrees below
the comet's orbital plane) it is not possible to decide whether the
tail is a product of one or more brief emission events or
continuous activity over a period of time. From the tail's length,
the maximum solar radiation pressure acceleration exerted on the
dust is estimated at about 0.1 percent of the solar gravitational
acceleration, which implies that the smallest dust particles in the
tail are about 1 mm in diameter (at an assumed density of 1 g/cm^3).
From the width of the tail, a lower limit on the normal component
of the particle velocity is about 0.1 m/s. An improved estimate
can be determined from the tail width around the time of the
earth's crossing the orbital plane on 2010 Feb. 9.

2010 January 25 (9110) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:50

28 January 2010
IAU Circular No.9111


--------------------------------------------------------------------------------
U SCORPII
--------------------------------------------------------------------------------

B. E. Schaefer, Louisiana State University, reports that B. G.
Harris (New Smyrna Beach, FL, USA) has discovered the recurrent
nova U Sco (cf. IAUC 7749, 8279) to be in outburst. On Jan.
28.4385 UT, U Sco was recorded with CCD images and visual
observations to be at magnitude V = 8.05. This discovery has been
confirmed by B. E. Schaefer with a 15.2-cm telescope and by S.
Dvorak (Clermont, FL, USA) at mag about 8.8 visually. M. Templeton,
AAVSO, reports the following previous magnitudes for U Sco: Jan.
27.450, V = 18.2 (Harris); 27.627, [16.5 (M. Linnolt, Hoolehua, HI,
USA; visual). This is the tenth discovered eruption, with the last
being in 1999 (cf. IAUC 7113), when it reached visual mag 7.5.
U Sco is located at R.A. = 16h22m30s.80, Decl. = -17o52'43".0
(equinox 2000.0). The entire peak (from quiescence to peak, to one
mag below peak) occurring inside of one day. This fast event
requires fast reaction to get observations near the peak.

--------------------------------------------------------------------------------
V2673 OPHIUCHI = NOVA OPHIUCHI 2010
--------------------------------------------------------------------------------

As first reported on CBETs 2128 and 2139 (where additional
details may be found), S. Nakano, Sumoto, Japan, forwarded the
discovery by H. Nishimura (Miyawaki, Kakegawa, Shizuoka-ken, Japan)
of an apparent nova (mag 8.4) on frames taken on Jan. 15.857 UT
with a Canon EOS 5D camera (+ Minolta 120-mm f/3.5 lens); Nakano
measured mag 8.8 and the following position from the discovery
image: R.A. = 17h39m40s.90, Decl. = -21o39'50".5 (equinox 2000.0).
Additional CCD magnitudes: 2009 Nov. 3, [11.0 (Nishimura); 2010
Jan. 13.86, [9.5: (Nishimura); 14.865, 10.1 (Nishimura; measured by
Nakano; limiting mag 10.6); 16.856, 8.4 (K. Itagaki, Takanezawa
station, Tochigi-ken, Japan, 0.30-m reflector; position end figures
40s.94, 47".9); 16.860, 8.2 (K. Kadota, Ageo, Saitama-ken, Japan,
0.25-m reflector; position end figures 40s.97, 47".4); 18.299, 8.4
(W. Vollmann, Vienna, Austria, and H. Koberger, Vilaflor, Tenerife;
green-band); 22.250, 9.5 (Vollmann and Koberger). Kadota adds that
nothing is visible at this position on a red Digitized Sky Survey
image from 1997 (limiting mag estimated to be 20 by Nakano). H.
Maehara, Kwasan Observatory, Kyoto University, reports that a low-
resolution spectrum (range 400-800 nm), obtained on Jan. 22.890
with a 25-cm telescope at Kwasan Observatory, shows H_alpha and Fe
II emission lines and suggests that this object is a classical nova
just after maximum. E. Kazarovets and N. Samus report that the
GCVS designation V2673 Oph has been assigned to this nova.

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Re: IAU Circulars (IAUCs) - циркуляры МАС - 01/2010

Сообщение Tikhon » 22 апр 2010, 15:50

28 January 2010
IAU Circular No.9112


--------------------------------------------------------------------------------
V5585 SAGITTARII = NOVA SAGITTARII 2010
--------------------------------------------------------------------------------

John Seach, Chatsworth Island, NSW, Australia, reports his
discovery of an apparent nova on three 6-s CCD exposures (limiting
mag 11) obtained on Jan. 20.72 UT (time corrected from that
published on CBET 2140) with a Nikon D300 camera (+ 50-mm f/1.4
lens + orange filter), providing a position for the variable as
R.A. = 18h07m26s, Decl. = -29o01' (equinox 2000.0); nothing is
visible at this position on his images taken on 2009 Nov. 15.89
(limiting mag 11.5). Following posting on the Central Bureau's
unconfirmed-objects webpage, S. Kiyota (Tsukuba, Japan) reports
that CCD images taken on Jan. 22 with a 20-cm reflector (and
Apogee Alta E47+ CCD camera) yield the following position end
figures for the variable: 26s.79, 00'42".8. Kiyota also provides
the following magnitudes for the nova: Jan. 22.862, V = 8.98, R_c
= 8.38; 22.864, I_c = 7.78. W. Vollmann, Vienna, Austria, reports
that he measured green mag 9.3 from unfiltered images taken by H.
Koberger (Vilaflor, Tenerife) with a digital SLR camera (+ 300-mm
camera lens) on Jan. 22.287, adding that nothing is visible within
10" of its position on Digitized Sky Survey blue and red images to
limiting mag approximately 18. K. Nishiyama (Kurume, Fukuoka-ken,
Japan) and F. Kabashima (Miyaki-cho, Saga-ken, Japan) report mag
8.5 and position end figures 26s.95, 00'43".6 from five 5-s
unfiltered CCD frames (limiting mag 15.0) taken around Jan. 23.892
using a Meade 0.40-m reflector (+ SBIG STL1001E camera). H.
Maehara, Kwasan Observatory, Kyoto University, reports that a low-
resolution spectrogram (range 400-800 nm), obtained on Jan. 23.887
with the 25-cm telescope of the Kwasan Observatory, shows H_alpha,
H_beta, and Fe II emission lines, suggesting that this object is a
"Fe II"-class nova. Additional details are given on CBETs 2140 and
2142. E. Kazarovets and N. N. Samus report that the GCVS
designation V5585 Sgr has been assigned to this nova.

--------------------------------------------------------------------------------
COMETS C/2009 M4 AND C/2009 M5 (SOHO)
--------------------------------------------------------------------------------

Further to IAUC 9094, additional Kreutz sungrazers have been
found on SOHO website images. C/2009 M4 was small and stellar in
appearance (peak mag about 7) on C3 images, but quite diffuse (mag
about 8.5) and elongated in C2 images. C/2009 M5 was very faint
(mag about 8.5) and very diffuse.

Comet 2009 UT R.A.(2000)Decl. Inst. F MPEC
C/2009 M4 June 24.488 6 04.5 +21 06 C3/2 RK 2009-P02
C/2009 M5 25.038 6 07.6 +21 50 C2 BZ 2009-P02

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