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IAUC 7292: C/1999 U2; C/1999 J3

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                                                  Circular No. 7292
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1999 U2 (SOHO)
    D. A. Biesecker, SM&A Corporation and Goddard Space Flight
Center, reports observations of a comet (not a Kreutz sungrazer)
discovered independently by S. Gregory (Stanford University) and by
J. D. Shanklin (Comet Section, British Astronomical Association) in
SOHO/LASCO C3 data.  The comet is very faint, and not visible in
very many frames.  Astrometry and orbital computations are given on
MPEC 1999-U29.

     1999 UT            R.A. (2000) Decl.
     Oct. 25.221      13 46.7       -10 29


COMET C/1999 J3 (LINEAR)
     Ephemeris extension to IAUC 7270 (elements MPC 36212):

1999/2000   R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Oct. 29     6 37.48   -55 45.8   0.611   1.181   91.7   57.2    8.5
Nov.  3     5 56.23   -65 12.9   0.706   1.229   91.2   53.8    9.1
      8     4 59.6    -71 14.3   0.816   1.280   89.7   50.7    9.7
     13     3 50.9    -74 23.2   0.936   1.334   87.6   47.9   10.2
     18     2 43.0    -75 21.2   1.061   1.389   85.3   45.2   10.8
     23     1 48.5    -74 58.3   1.187   1.446   82.8   42.7   11.3
     28     1 09.9    -73 56.1   1.313   1.504   80.3   40.3   11.8
Dec.  3     0 44.3    -72 39.2   1.438   1.563   77.9   38.1   12.2
      8     0 27.7    -71 19.5   1.560   1.623   75.5   36.0   12.6
     13     0 17.4    -70 02.4   1.680   1.684   73.2   34.0   13.0
     18     0 11.33   -68 50.1   1.797   1.745   71.0   32.2   13.4
     23     0 08.34   -67 43.2   1.909   1.806   68.9   30.5   13.8
     28     0 07.58   -66 41.7   2.018   1.867   67.0   29.0   14.1
Jan.  2     0 08.52   -65 45.3   2.123   1.929   65.2   27.6   14.4
      7     0 10.79   -64 53.8   2.223   1.990   63.6   26.3   14.7
     12     0 14.11   -64 07.0   2.318   2.052   62.1   25.1   15.0
     17     0 18.28   -63 24.6   2.409   2.113   60.9   24.0   15.3
     22     0 23.15   -62 46.3   2.495   2.174   59.8   23.0   15.5
     27     0 28.62   -62 12.0   2.577   2.235   59.0   22.2   15.8

     Visual m_1 and coma-diameter estimates:  Oct. 11.51 UT, 6.9,
16' (R. Keen, Mt. Thorodin, CO, 7x50 binoculars); 17.13, 7.2, 10'
(K. Hornoch, Lelekovice, Czech Republic, 10x80 binoculars); 20.83,
8.0, 7'.4 (A. Pearce, Nedlands, W. Australia, 20x80 binoculars).

                      (C) Copyright 1999 CBAT
1999 October 28                (7292)            Daniel W. E. Green

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