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IAUC 6465: C/1995 O1; C/1996 P2

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                                                  Circular No. 6465
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
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)
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1995 O1 (HALE-BOPP)
     L. H. Wasserman, Lowell Observatory, writes that comet C/1995 O1
will occult the star PPM 200723 (R.A. = 17h23m59s.845, Decl. =
-4d48'09".45, equinox 2000.0, epoch 1996.8; V = 9.2) on Oct. 5.13 UT, the
nominal track currently crossing the U.S. from southern California to
northeastern Minnesota.  The comet has a sky-plane velocity of
0".092 (5.1 km)/s.  Detailed predictions and a map of the ground track
are available at http://www.lowell.edu/users/buie/occ/predict.html.

     Total visual magnitudes (moonlight interfering during
Aug. 23-27): Aug. 17.25 UT, 5.1 (R. Keen, Mt. Thorodin, CO, naked eye);
19.10, 5.7 (J. E. Bortle, Stormville, NY, 10 x 50 binoculars; tail 1.0 deg);
21.22, 5.4 (C. E. Spratt, Victoria, BC, 7 x 50 binoculars); 23.87, 5.6
(A. Pereira, Carnaxide, Portugal, 9 x 34 binoculars); 25.84, 5.0 (K.
Hornoch, Lelekovice, Czech Republic, 10 x 50 binoculars); 27.87, 5.6
(Pereira); 29.87, 5.7 (Pereira).

     Corrigendum.  On IAUC 6463, line 15, for F. Crippa read R. Crippa


COMET C/1996 P2 (RUSSELL-WATSON)
     Improved parabolic orbital elements from MPC 27690:

     T = 1996 Feb. 29.518 TT          Peri. = 188.661
                                      Node  = 101.556   2000.0
     q = 2.01067 AU                   Incl. =  29.134

1996 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Sept. 4     1 38.58    -33 42.8    2.183    2.969  133.4   14.3     12.4
      9     1 36.36    -34 21.3    2.206    3.009  135.5   13.6     12.5
     14     1 33.63    -34 54.8    2.234    3.049  137.2   13.0     12.6
     19     1 30.49    -35 22.3    2.266    3.090  138.4   12.5     12.7
     24     1 27.03    -35 43.4    2.304    3.131  139.0   12.1     12.8
     29     1 23.38    -35 57.6    2.347    3.172  139.1   11.9     12.9
Oct.  4     1 19.62    -36 04.7    2.395    3.214  138.5   11.9     13.0
      9     1 15.87    -36 04.7    2.449    3.255  137.4   12.0     13.1
     14     1 12.24    -35 57.6    2.508    3.297  135.8   12.2     13.2

     Total visual magnitude estimates: Aug. 17.13, 12.2 (J. M. San Juan,
Teruel, Spain, 0.44-m reflector); 19.08, 12.8 (J. Carvajal, Teruel,
Spain, 0.44-m reflector); 21.43, 12.7 (A. Hale, Cloudcroft, NM, 0.41-m
reflector); 25.02, 12.3 (K. Sarneczky, Raktanya, Hungary, 0.44-m reflector).

                      (C) Copyright 1996 CBAT
1996 August 30                 (6465)              Brian G. Marsden

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