Circular No. 6466

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                                                  Circular No. 6466




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/1996 N1 (BREWINGTON)
     Continuation to the ephemeris on IAUC 6435 (elements MPC 27690):

1996 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Sept. 4    14 57.08    +50 58.6    0.961    1.080   66.5   58.9      8.2
      9    15 20.78    +53 09.2    0.967    1.127   69.5   56.9      8.4
     14    15 47.22    +55 00.8    0.974    1.177   72.9   54.8      8.6
     19    16 16.65    +56 30.1    0.981    1.230   76.6   52.6      8.9
     24    16 48.98    +57 33.1    0.989    1.286   80.4   50.3      9.1
     29    17 23.71    +58 05.6    0.999    1.343   84.4   47.9      9.3
Oct.  4    17 59.89    +58 04.0    1.012    1.403   88.4   45.5      9.5
      9    18 36.28    +57 27.1    1.030    1.463   92.3   43.0      9.7
     14    19 11.54    +56 16.3    1.054    1.525   96.0   40.6      9.9
     19    19 44.63    +54 36.2    1.083    1.587   99.4   38.3     10.2
     24    20 14.91    +52 33.4    1.120    1.649  102.3   36.1     10.4
     29    20 42.17    +50 14.9    1.164    1.712  104.8   34.1     10.7
Nov.  3    21 06.50    +47 47.9    1.216    1.775  106.6   32.4     10.9

     Total visual magnitude estimates: Aug. 13.87 UT, 7.5 (J. M. San Juan,
Teruel, Spain, 10 x 70 binoculars); 16.86, 7.5 (M. V. Zanotta, Mt. Ponna,
Italy, 7 x 42 binoculars); 19.89, 8.1 (R. J. Bouma, Groningen, The
Netherlands, 0.25-m reflector); 22.89, 8.4 (A. Diepvens, Balen, Belgium,
0.15-m refractor); 25.83, 8.3 (K. Hornoch, Lelekovice, Czech Republic,
10 x 80 binoculars; moonlight).


1996 PW
     D. L. Rabinowitz, Jet Propulsion Laboratory, points out that his
data on IAUC 6452 gave reflectance colors, implying that the spectrum is
indeed redder than solar (see also IAUC 6462).  A refined reduction
yields V = 17.42 +/- 0.03 on Aug. 14.4 UT and 17.22 +/- 0.07 on Aug. 15.4,
with mean reflectance colors (from five observations) V-R = +0.18 +/- 0.04,
V-I = +0.34 +/- 0.03, consistent with the spectra of S- or D-type objects.


NOVA CRUCIS 1996
     Visual magnitude estimates extracted from VSNET, Kyoto, suggest that
this object (IAUC 6463) has faded rapidly: Aug. 28.702 UT, 10.6 (B. Monard,
Pretoria, South Africa); 29.720, 10.8 (Monard); 30.429, 10.8 (P. Nelson,
Ellinbank, N.S.W., Australia); 30.451, 11.0 (F. Farrell, Adelaide, S.A.,
Australia); 30.717, 11.3 (Monard).

                      (C) Copyright 1996 CBAT
1996 August 31                 (6466)              Brian G. Marsden