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IAUC 6562: 1997 D1; P/1997 C1; 118P; 1996cb

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                                                 Circular No. 6562
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/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET 1997 D1
     Jean Mueller reports her discovery of a comet on a plate taken
by K. M. Rykoski and J. D. Mendenhall with the 1.2-m Oschin Schmidt
telescope in the course of the second Palomar Sky Survey.  The
comet is slightly diffuse with some central condensation; no tail
is visible.  The following positions from beginnings and ends of
trails were reduced by B. G. Marsden, following measurement by J.
Mueller:

     1997 UT             R.A. (2000) Decl.        m1
     Feb. 17.46667   12 48 21.29   +46 23 44.1   16
          17.50833   12 48 15.70   +46 24 34.6
          19.51736   12 43 12.93   +47 08 50.0
          19.53472   12 43 10.81   +47 09 07.3


COMET P/1997 C1 (GEHRELS)
     New orbital elements for this comet (IAUC 6549, 6550),
published on MPEC 1997-D06 and MPC 29067 (and used for the
ephemeris below), show it to be of short period (P = 17 years).

1997 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Feb. 21     9 01.02    +13 07.8    3.430    4.377  161.1    4.2     17.1
Mar.  3     8 56.72    +13 30.8    3.522    4.409  150.1    6.4     17.2
     13     8 53.59    +13 49.9    3.640    4.442  139.3    8.4     17.3
     23     8 51.86    +14 04.0    3.780    4.475  128.9   10.0     17.4
Apr.  2     8 51.59    +14 12.5    3.938    4.508  119.0   11.2     17.5
     12     8 52.77    +14 15.2    4.108    4.541  109.4   12.0     17.6
     22     8 55.32    +14 12.0    4.287    4.574  100.3   12.5     17.8


COMET 118P/SHOEMAKER-LEVY 4
     Total visual magnitude estimates:  Jan. 14.98 UT, 12.8 (R. J.
Bouma, Groningen, The Netherlands, 0.25-m reflector); Feb. 2.75,
12.8 (K. Hornoch, Lelekovice, Czech Republic, 0.35-m reflector);
8.89, 12.5 (J. Carvajal, Madrid, Spain, 0.44-m reflector); 14.79,
12.6 (M. Plsek, Lelekovice, Czech Republic, 0.35-m reflector).


SUPERNOVA 1996cb IN NGC 3510
     On IAUC 6524, line 3, for SN 1996ca read SN 1996cb

                      (C) Copyright 1997 CBAT
1997 February 19               (6562)            Daniel W. E. Green

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