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IAUC 9113: COMET C/2010 B1 (CARDINAL); COMETS C/2009 M6, C/2009 M7, C/2009 M8, C/2009 N1 (SOHO)

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                                                  Circular No. 9113
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2010 B1 (CARDINAL)
     As first announced on CBET 2141, an apparently asteroidal
object discovered by R. D. Cardinal (Rothney Astrophysical
Observatory, University of Calgary, 0.50-m f/1.0 reflector;
discovery observation tabulated below), and placed on the 'NEO
Confirmation Page', has been reported as cometary by several CCD
astrometrists.  Y. Ikari (Moriyama, Shiga-Ken, Japan, 0.26-m
reflector) notes that some of his exposures on Jan. 22.6 UT showed
a coma of diameter 0'.2.  D. Chestnov, Moscow, writes that three
stacked 300-s unfiltered exposures on Jan. 22.8 by T. Kryachko
(Engelhardt Observatory, Zelenchukskaya Station, 0.3-m reflector)
showed that the object appeared "softer" than the surrounding stars,
having a 0'.1-0'.2 coma with a strong condensation but no tail.
J. M. Aymami (Tiana, Spain, 0.25-m reflector) remarks that 39 co-
added images totaling 3900 seconds, taken around Jan. 22.9, showed
a compact-but-nebulous object displaying what seemed to be a faint
coma measuring 7".5.

     2010 UT             R.A. (2000) Decl.       Mag.   Observer
     Jan. 19.22247    8 12 28.90   +73 42 01.1   17.7   Cardinal

The following parabolic orbital elements from MPEC 2010-B54 are
from observations spanning Jan. 19-26:

     T = 2011 Feb.  6.807 TT          Peri. = 211.674
                                      Node  = 277.262   2000.0
     q = 2.93361 AU                   Incl. = 101.937


COMETS C/2009 M6, C/2009 M7, C/2009 M8, C/2009 N1 (SOHO)
     Additional presumed comets have been found on SOHO website
images -- Kreutz sungrazers except for C/2009 M8 and C/2009 N1
(non-group).  C/2009 M6 was very faint (mag about 8.5) and slightly
diffuse.  C/2009 M7 was diffuse (mag about 8).  C/2008 M8 was
appeared stellar, appearing quite bright (mag about 6.5-7) but
fading fast in C2 images.  C/2009 N1 was slightly diffuse (mag
about 7) in C3 images, and a faint, diffuse streak in C2 images.

 Comet       2009 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2009 M6   June 25.604    6 09.9  +21 52   C2     MU   2009-P02
 C/2009 M7        26.908    6 15.3  +21 48   C2     BZ   2009-P20
 C/2009 M8        30.071    6 32.4  +25 58   C3/2   RK   2009-P20
 C/2009 N1   July  2.596    6 42.8  +26 41   C3/2   BZ   2009-P20

                      (C) Copyright 2010 CBAT
2010 January 29                (9113)            Daniel W. E. Green

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