Central Bureau for Astronomical Telegrams

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IAUC 8774: C/2006 S10, C/2006 S11; C/2006 V1

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IAUC number

                                                  Circular No. 8774
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

COMETS C/2006 S10 AND C/2006 S11 (SOHO)
     Two additional Kreutz sungrazing comets have been found on
SOHO website images (cf. IAUC 8772).  K. Battams notes that C/2006
S10 was small and stellar in appearance (mag about 6) in C3
coronagraph images, while in C2 images it appeared very small,
faint, and diffuse.  C/2006 S11 was small with a hint of tail and
peaked in brightness at mag about 5.5 in C3 images, but it was very
diffuse and elongated in C2 images.

 Comet        2006 UT        R.A.(2000)Decl.   Inst.  F    MPEC
 C/2006 S10   Sept. 18.763   11 23.9  + 0 38   C3/2   RM   2006-U63
 C/2006 S11         18.821   11 24.9  + 0 43   C3/2   RM   2006-U63

     Regarding an apparently asteroidal object found the previous
night in the course of the Catalina Sky Survey, E. J. Christensen
reports that four stacked 60-s CCD exposures obtained in poor
seeing with the 1.5-m reflector at Mount Lemmon on Nov. 12.5 UT
show an asymmetric 8" coma, slightly extended toward p.a. 310 deg.
Following posting by the Minor Planet Center on its 'NEOCP' webpage,
J. Young writes that his CCD images taken with the Table Mountain
0.61-m reflector on Nov. 15.43-15.48 UT show a round 6"-diameter
coma with little or no central condensation and a suspected very
weak, narrow, straight tail in p.a. about 300 deg.  R. A. Kowalski
reports that CCD images obtained with the Mount Lemmon 1.5-m
reflector on Nov. 15.5 in poor seeing show a slightly condensed
nucleus with a coma diameter of approximately 11".

     2006 UT             R.A. (2000) Decl.       Mag.
     Nov. 11.49270   10 55 05.44   +10 48 36.7   18.5

     The available astrometry, the following preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2006-V63.

     T = 2007 Nov. 24.545 TT          Peri. = 244.398
                                      Node  = 336.244   2000.0
     q = 3.06870 AU                   Incl. =  30.017

                      (C) Copyright 2006 CBAT
2006 November 15               (8774)            Daniel W. E. Green

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