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IAUC 9021: COMET P/2009 D1 (LINEAR); C/2008 U5-U8

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                                                  Circular No. 9021
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 P/2009 D1 (LINEAR)
     J. V. Scotti, Lunar and Planetary Laboratory, University of
Arizona, reports his recovery of comet P/2001 CV_8 (cf. IAUC 7581)
on CCD images taken with the Spacewatch 1.8-m f/2.7 reflector.  On
the Feb. 19 images, Scotti noted the comet to be slightly diffuse
with a 0'.3 tail in p.a. 295 deg.

     2009 UT             R.A. (2000) Decl.       Mag.   Observer
     Feb. 19.53123   14 25 47.23   -18 07 57.9   20.9   Scotti
          19.54112   14 25 47.49   -18 08 01.9   20.8     "
          19.54978   14 25 47.71   -18 08 05.6   21.0     "
          20.49075   14 26 12.21   -18 14 49.9            "
          20.50000   14 26 12.30   -18 14 54.4   20.7     "
          20.50910   14 26 12.53   -18 14 59.1            "

The indicated correction to the prediction on MPC 54170 is Delta(T)
= -0.37 day [and to the prediction in the 2008/2009 Comet Handbook,
Delta(T) = -0.24 day].  The following orbital elements by B. G.
Marsden are from 141 observations, 2001-2009 (mean residual 0".7):

                    Epoch = 2008 Oct. 21.0 TT
     T = 2008 Oct. 10.9768 TT         Peri. = 151.5970
     e = 0.444137                     Node  = 359.8931  2000.0
     q = 2.159879 AU                  Incl. =   9.0351
       a =  3.885631 AU    n = 0.1286802    P =   7.66 years


COMETS C/2008 U5-U8 (SOHO)
     Further to IAUC 9020, additional near-sun presumed comets have
been found on SOHO website images -- all Kreutz sungrazers except
for C/2008 U6 (non-group), which was small and stellar in
appearance (mag about 7.5).  C/2008 U5 was extremely faint (mag
about 8.5) and very diffuse.  C/2008 U7 was stellar in appearance
and perhaps slightly elongated (mag about 7) in C3 images, but
quite diffuse with a thin, diffuse, faint tail in C2 images.
C/2008 U8 was very diffuse (mag about 8-8.5).

 Comet        2008 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2008 U5    Oct. 18.188   13 28.1  -10 55   C2     RM   2009-B66
 C/2008 U6         18.440   13 31.0  - 7 53   C2     MK   2009-B67
 C/2008 U7         20.571   13 29.8  -12 09   C3/2   RK   2009-B67
 C/2008 U8         20.746   13 36.0  -11 41   C2     TH   2009-B67

                      (C) Copyright 2009 CBAT
2009 February 20               (9021)            Daniel W. E. Green

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