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IAUC 8398: COMET 2004 R1; C/2002 K11, C/2004 P2-P5; C/2004 Q2

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                                                  Circular No. 8398
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://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET 2004 R1
     R. H. McNaught reports his discovery of a comet on CCD images
taken by himself with the 0.5-m Uppsala Schmidt telescope at Siding
Spring on Sept. 2.4 UT, when the object was diffuse with a hint of
a tail to the southeast.  Images taken by McNaught with the Siding
Spring 1.0-m f/8 reflector on Sept. 4.4 show the comet to be
diffuse with a 10" coma and a tail 15" long in p.a. 110 deg.
Available astrometry by McNaught:

     2004 UT             R.A. (2000) Decl.       Mag.
     Sept. 2.42449   15 06 39.13   -16 52 53.6   17.6
           2.43392   15 06 42.02   -16 52 58.7   17.5
           2.44340   15 06 44.90   -16 53 04.8   17.4
           2.45293   15 06 47.63   -16 53 09.9   18.3
           4.36913   15 16 28.16   -17 11 24.4   19.1
           4.37098   15 16 28.75   -17 11 24.9   19.1
           4.37284   15 16 29.20   -17 11 25.8   19.4
           4.42519   15 16 45.15   -17 11 54.0   19.2


COMETS C/2002 K11 AND C/2004 P2-P5 (SOHO)
     Continuation to IAUC 8394 (all Kreutz sungrazers; HS = H. Su):

 Comet        2002 UT      R.A.(2000)Decl.   Inst.  F    MPEC
 C/2002 K11   May  26.671   4 14.7  +19 39   C2     DE  2002-Q11

 Comet        2004 UT      R.A.(2000)Decl.   Inst.  F    MPEC
 C/2004 P2    Aug.  4.096   8 41.6  +15 56   C3     DE  2004-R02
 C/2004 P3          5.638   8 46.6  +15 36   C3     JS  2004-R02
 C/2004 P4          6.346   8 50.3  +15 21   C3     XL  2004-R02
 C/2004 P5          8.571   8 55.7  +13 21   C3     HS  2004-R02


COMET C/2004 Q2 (MACHHOLZ)
     Visual total-magnitude and coma-diameter estimates in
moonlight:  Aug. 28.16 UT, 10.9, 2'.3 (J. J. Gonzalez, Leon, Spain,
0.20-m reflector); 30.88, 11.0, 1'.8 (A. Pearce, Nedlands, W.
Australia, 0.41-m reflector); 31.71, 10.5:, about 2'.0 (J.
Drummond, Gisborne, New Zealand, 0.41-m reflector).

                      (C) Copyright 2004 CBAT
2004 September 4               (8398)            Daniel W. E. Green

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