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IAUC 9160: COMET P/2010 P2 (LINEAR); C/2009 W6-W11

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IAUC number 

                                                  Circular No. 9160
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 P/2010 P2 (LINEAR)
     H. Sato, Tokyo, reports his recovery of comet P/1999 U3 (cf.
IAUCs 7295, 7296, 7302) showing a 15" coma on CCD images obtained
remotely with a 0.25-m f/3.4 reflector located at the RAS
Observatory near Mayhill, NM, U.S.A.; he noted a 30" tail in p.a.
290 deg on Aug. 13.4 UT.

     2010 UT             R.A. (2000) Decl.       Mag.
     Aug. 12.43975    6 14 58.28   +37 09 58.3
          12.44348    6 14 58.95   +37 09 58.3
          12.44627    6 14 59.38   +37 09 58.1   17.6
          13.43583    6 17 50.59   +37 06 57.7
          13.43963    6 17 51.33   +37 06 55.8
          13.44343    6 17 52.01   +37 06 55.1   17.7

The indicated correction to the prediction by S. Nakano on MPC
59600 is Delta(T) = -0.22 day.  The following linked orbital
elements by G. V. Williams and an ephemeris appear on MPEC 2010-P57.

                    Epoch = 2010 July 23.0 TT
     T = 2010 July 18.3009 TT         Peri. = 110.1566
     e = 0.610975                     Node  = 305.9731  2000.0
     q = 1.921410 AU                  Incl. =  20.8851
       a =  4.939040 AU    n = 0.0897925    P =  10.98 years


COMETS C/2009 W6-W11 (SOHO)
     Further to IAUC 9156, additional near-sun presumed comets have
been found on SOHO website images, all Kreutz sungrazers except for
C/2009 W8 (non-group).  C/2009 W6 was small (peak mag about 7.5).
C/2009 W10 was very diffuse (mag about 8), while C/2009 W11 was
condensed (peak mag about 7-7.5).  The others' peak magnitudes were
about 7.5-8, with C/2009 W7 being slightly diffuse and the other
two being small and stellar in appearance.

 Comet       2009 UT        R.A.(2000)Decl.   Inst.  F    MPEC
 C/2009 W6   Nov. 19.064    15 34.4  -21 00    C2    JR   2010-L91
 C/2009 W7        22.679    15 47.0  -22 52    C3/2  MK   2010-L91
 C/2009 W8        23.596    15 48.8  -21 43    C3/2  TS   2010-L91
 C/2009 W9        25.188    16 01.9  -22 26    C2    MK   2010-L91
 C/2009 W10       25.771    16 05.8  -22 40    C2    MK   2010-L91
 C/2009 W11       27.604    16 12.3  -22 53    C2    MK   2010-L91

                      (C) Copyright 2010 CBAT
2010 August 13                 (9160)            Daniel W. E. Green

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