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IAUC 8333: COMET P/2004 HC_18 (LINEAR); C/2003 K13, C/2003 M8-M12, C/2003 N1-N2

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                                                  Circular No. 8333
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 P/2004 HC_18 (LINEAR)
     An apparently asteroidal object discovered by the LINEAR
survey (discovery observation given below from MPS 105288) has been
found to have cometary appearance by A. Gleason and J. Larsen on
CCD exposures taken by J. Scotti with the Spacewatch telescope on
Apr. 25.34-25.39 UT, when it showed a coma of diameter about 5"
(and mag 17.6-17.9) and two tails:  a diffuse component
approximately 7" long in p.a. 350-355 deg and a very diffuse but
more obvious tail approximately 10"-16" long spanning p.a. 275-335
deg.

     2004 UT             R.A. (2000) Decl.       Mag.
     Apr. 17.34932   15 10 51.35   -19 15 39.8   19.1

Additional astrometry, the following elliptical orbital elements,
and an ephemeris appear on MPEC 2004-H90.

     T = 2004 June 18.494 TT          Peri. =  30.716
     e = 0.51050                      Node  = 219.568   2000.0
     q = 1.71315 AU                   Incl. =  23.542
       a =  3.49981 AU     n = 0.150535     P =   6.55 years


COMETS C/2003 K13, C/2003 M8-M12, C/2003 N1-N2 (SOHO)
     Further to IAUC 8327, K. Battams reports his measurements of
the positions of several Kreutz sungrazing comets found on SOHO C2
website images by D. Evans (C/2003 K13), X.-m. Zhou (C/2003 M8, M9,
M10), X. Leprette (C/2003 M11, M12, N1), R. Kracht (C/2003 M12),
and J. Sachs (C/2003 N1, N2).   C/2003 N1 was also observed on C3
images.  The reduced astrometry by B. G. Marsden and R. Kisala and
orbital elements appear on the MPECs cited below.

  Comet         2003 UT          R.A. (2000) Decl.       MPEC
  C/2003 K13    May  23.910       4 02.3  +19 01       2004-H49
  C/2003 M8     June 22.246       5 56.8  +21 39       2004-H49
  C/2003 M9          23.169       6 00.7  +22 03       2004-H49
  C/2003 M10         23.188       6 00.3  +21 48       2004-H49
  C/2003 M11         23.329       6 01.4  +21 35       2004-H49
  C/2003 M12         23.421       6 01.1  +21 41       2004-H49
  C/2003 N1     July  5.763       6 49.8  +21 29       2004-H87
  C/2003 N2          13.029       7 16.0  +20 11       2004-H87

                      (C) Copyright 2004 CBAT
2004 April 30                  (8333)            Daniel W. E. Green

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