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IAUC 7112: C/1999 D1

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                                                  Circular No. 7112
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 D1 (HERMANN)
     Precise positions (CCD unless otherwise stated):

     1999 UT             R.A. (2000) Decl.        m1    Observer
     Feb. 21.51114   12 14 18.13   + 2 50 03.7   17.9   Scotti
          21.51682   12 14 17.89   + 2 49 54.1   17.9     "
          21.71693   12 14 10.36   + 2 44 24.7   17.3   Kojima
          21.72361   12 14 10.00   + 2 44 12.8   19.1   Seki
          21.72999   12 14 09.80   + 2 44 02.1   17.2   Kojima
          22.09322   12 13 55.80   + 2 34 12.0   17.3   Jacques
          22.10294   12 13 55.39   + 2 33 56.2   17.4     "
          22.38877   12 13 43.15   + 2 25 53.1          Shelus
          22.39977   12 13 42.65   + 2 25 34.8            "
          22.61012   12 13 34.43   + 2 19 44.0   17.5   Sugie
          22.63839   12 13 33.08   + 2 18 57.8            "
          22.64268   12 13 32.81   + 2 18 50.1          Asami

J. V. Scotti (Kitt Peak).  0.9-m Spacewatch telescope.  m2 = 20.2.  Coma
   diameter 13".0.  Tail 2'.17 long in p.a. 300 deg.
T. Kojima (Chiyoda).  0.25-m f/6.0 reflector.  Faint tail in p.a. 300 deg.
T. Seki (Geisei).  0.6-m f/3.5 reflector.  Photographic observation.
C. Jacques (Serra da Piedade).  0.3-m f/3.3 Schmidt-Cassegrain.
P. J. Shelus, J. G. Ries and J. L. Africano (McDonald).  0.76-m reflector.
A. Sugie (Dynic).  0.60-m f/5.0 reflector.  Communicated by S. Nakano.
A. Asami (Hadano).  0.28-m f/5.0 reflector.  Communicated by S. Nakano.

     The following parabolic orbital elements are from 21 observations
Feb. 20-22.  The comet is probably of short period.

     T = 1999 Feb. 18.059 TT          Peri. = 173.497
                                      Node  = 350.549   2000.0
     q = 1.81337 AU                   Incl. =  25.772

1999 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Feb. 21    12 14.64    + 3 04.2    0.891    1.814  149.5   16.1     17.3
     26    12 11.02    + 0 45.5    0.871    1.816  154.7   13.5     17.3
Mar.  3    12 06.59    - 1 34.8    0.858    1.821  159.8   10.8     17.3
      8    12 01.53    - 3 54.6    0.852    1.828  164.7    8.2     17.3
     13    11 56.03    - 6 11.3    0.852    1.837  168.7    6.1     17.3
     18    11 50.34    - 8 22.3    0.859    1.848  170.4    5.1     17.3
     23    11 44.71    -10 25.7    0.874    1.861  168.9    5.9     17.4

                      (C) Copyright 1999 CBAT
1999 February 22               (7112)              Brian G. Marsden

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