[IAUC] IAUC 9200: COMET C/2011 C3 (GIBBS); C/2009 Y9-Y14; C/2009 Y15 [25139-2011/04-R1]
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Mie Sep 14 16:19:05 ART 2011
Circular No. 9200
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
New postal address: Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
CBATIAU en EPS.HARVARD.EDU ISSN 0081-0304
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network
COMET C/2011 C3 (GIBBS)
A. R. Gibbs reports his discovery of another comet on CCD
images taken with the Mt. Lemmon 1.5-m reflector (discovery
observation tabulated below); his initial four co-added 30-s
exposures show a compact coma of size 3" x 3".5 with a faint,
tapered, 6" tail in p.a. 290 deg.
2011 UT R.A. (2000) Decl. Mag. Observer
Feb. 12.50235 15 21 25.16 - 7 48 06.5 19.8 Gibbs
The available astrometry, the following preliminary parabolic
orbital elements by G. V. Williams, and an ephemeris appear on MPEC
2011-D01.
T = 2011 Apr. 8.505 TT Peri. = 207.657
Node = 20.878 2000.0
q = 1.51088 AU Incl. = 49.636
COMETS C/2009 Y9-Y14 (SOHO)
Further to IAUC 9198, additional near-sun comets have been
found on SOHO website images -- presumed Kreutz sungrazers except
for C/2009 Y10 (Kracht group), which was stellar in appearance
(peak mag about 7). K. Battams notes that C/2009 Y9 was very small
(peak mag about 8). C/2009 Y11 peaked near mag 7.5-8. C/2009 Y12
was slightly diffuse (peak mag about 6.5-7). C/2009 Y13 was
diffuse with a tail (peak mag about 6.5). C/2009 Y14 was slightly
diffuse with a short tail (peak mag about 6.5).
Comet 2009 UT R.A.(2000)Decl. Inst. F MPEC
C/2009 Y9 Dec. 22.814 18 09.8 -24 51 C2 BZ 2010-M19
C/2009 Y10 20.381 17 48.3 -22 45 C2 RK 2010-O30
C/2009 Y11 25.221 18 21.6 -25 33 C3/2 MU 2010-O30
C/2009 Y12 26.071 18 26.7 -26 15 C3/2 BZ 2010-O30
C/2009 Y13 26.263 18 30.8 -28 37 C3/2 BZ 2010-O30
C/2009 Y14 28.431 18 41.8 -27 46 C3/2 BZ 2010-O30
COMET C/2009 Y15 (STEREO)
Further to IAUC 9151, a faint, slightly diffuse Kreutz
sungrazer was found on STEREO HI1-A website images (peak mag about
11-12).
Comet 2009 UT R.A.(2000)Decl. Inst. F MPEC
C/2009 Y15 Dec. 29.933 23 15.7 - 7 41 HI-1 AW 2010-O31
(C) Copyright 2011 CBAT
2011 February 15 (9200) Daniel W. E. Green
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