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IAUC 9088: COMET C/2009 U5 (GRAUER); C/2009 J3-J10

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IAUC number 

                                                  Circular No. 9088
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/2009 U5 (GRAUER)
     A. D. Grauer reports the discovery of a comet on four co-added
60-s CCD exposures taken with the Mount Lemmon 1.5-m reflector, the
object having a very condensed coma about 7" wide and a faint tail
20" long in p.a. 280 deg.  Following posting on the Minor Planet
Center's 'NEOCP' webpage, W. H. Ryan reported finding a tail in p.a.
about 270 deg on CCD exposures taken by E. V. Ryan and himself with
the Magdalena Ridge Observatory 2.4-m f/8.9 reflector on Oct. 24.5
and 25.4 UT.

     2009 UT             R.A. (2000) Decl.       Mag.   Observer
     Oct. 23.45917    8 57 56.19   +18 02 13.0   19.4   Grauer

Additional astrometry, the following very preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2009-U100:

     T = 2010 Aug. 23.034 TT          Peri. = 139.324
                                      Node  = 118.302   2000.0
     q = 0.57126 AU                   Incl. =  43.016


COMETS C/2009 J3-J10 (SOHO)
     Further to IAUC 9084, additional Kreutz sungrazers have been
found on SOHO website images.  C/2009 J3 (peak mag about 6.5),
C/2009 J5 (mag about 8-8.5), C/2009 J7 (mag about 8.5), and C/2009
J9 (mag about 7.5-8) were all stellar in appearance and generally
small or tiny.  C/2009 J4 was a diffuse streak (mag about 7.5-8).
C/2009 J6 was slightly diffuse and tiny (mag about 7.5) in C3
images, and slightly diffuse but elongated in C2 images.  C/2009 J8
was quite condensed (mag about 7).  C/2009 J10 was quite diffuse
and slightly elongated (mag about 7.5-8).

 Comet        2009 UT      R.A.(2000)Decl.   Inst.  F    MPEC
 C/2009 J3    May  3.846    2 51.6  +13 05    C3    TH   2009-N46
 C/2009 J4         5.033    2 50.3  +14 41    C2    MU   2009-N46
 C/2009 J5         6.192    2 56.8  +15 05    C2    BZ   2009-N46
 C/2009 J6         6.529    3 00.7  +14 54    C3/2  RK   2009-N47
 C/2009 J7         6.617    2 58.8  +15 15    C2    ML   2009-N47
 C/2009 J8         8.633    3 06.2  +15 50    C2    MK   2009-N47
 C/2009 J9         9.576    3 09.7  +15 59    C2    MK   2009-N47
 C/2009 J10       11.351    3 16.1  +16 26    C2    RK   2009-N49

                      (C) Copyright 2009 CBAT
2009 October 25                (9088)            Daniel W. E. Green

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