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IAUC 9156: COMET C/2010 M1 (GIBBS); C/2009 V3-V7, C/2009 W3-W5

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IAUC number 

                                                  Circular No. 9156
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  D. W. E. Green, Room 209; Department of
 Earth and Planetary Sciences; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
CBAT@IAU.ORG; CBATIAU@EPS.HARVARD.EDU
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304


COMET C/2010 M1 (GIBBS)
     A. R. Gibbs reports his discovery of a comet (discovery
observation tabulated below) on CCD images taken in the course of
the Mount Lemmon Survey with the 1.5-m reflector; co-added images
taken during June 22.22-22.29 UT in excellent seeing show a "fuzzy"
coma of diameter 3'.5 (and magnitude 20.2-20.9) with no visible
tail; follow-up images on June 23.3 show a similar appearance (mag
20.1-20.7).  After posting on the Minor Planet Center's 'NEOCP'
webpage, CCD images taken by R. S. McMillan and C. K. Maleszewski
with the Spacewatch 1.8-m f/2.7 reflector at Kitt Peak on June
23.3 also show the comet to be diffuse.

     2010 UT             R.A. (2000) Decl.       Mag.   Observer
     June 22.22315   17 06 07.84   + 0 39 22.7   20.9   Gibbs

The available astrometry, the following preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2010-M51.

     T = 2012 Feb.  7.840 TT          Peri. = 265.318
                                      Node  =  82.150   2000.0
     q = 2.29869 AU                   Incl. =  78.373


COMETS C/2009 V3-V7 AND C/2009 W3-W5 (SOHO)
     Further to IAUC 9155, additional Kreutz sungrazers have been
found on SOHO website images.  K. Battams notes that C/2009 V3 was
very faint (peak magnitude about 7.5-8).  C/2009 V4 was slightly
diffuse with a very short tail.  C/2009 V5 was somewhat diffuse.
C/2009 V6 was slightly diffuse with a "slight" tail.  C/2009 V7 was
diffuse (peak mag about 6) with a "slight" tail.  C/2009 W3, which
was also found by B. Zhou, was slightly diffuse (peak mag about 6.5).
C/2009 W4 was very slightly diffuse (peak mag about 6.5).  C/2009
W5 was slightly diffuse (peak mag about 7-7.5).

 Comet       2009 UT        R.A.(2000)Decl.   Inst.  F    MPEC
 C/2009 V3   Nov.  2.738    14 21.1  -16 58    C3    JR   2010-L85
 C/2009 V4         3.233    14 28.0  -16 18    C2    JR   2010-L85
 C/2009 V5         6.777    14 40.0  -17 57    C3/2  TS   2010-L90
 C/2009 V6        13.571    15 08.1  -20 28    C3/2  ZX   2010-L90
 C/2009 V7        15.738    15 12.5  -21 40    C3/2  AK   2010-L90
 C/2009 W3        16.596    15 20.4  -22 29    C3/2  JR   2010-L90
 C/2009 W4        17.138    15 17.4  -22 33    C3/2  JR   2010-L90
 C/2009 W5        17.138    15 23.6  -21 11    C3/2  JR   2010-L90

                      (C) Copyright 2010 CBAT
2010 June 23                   (9156)            Daniel W. E. Green

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