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IAUC 6349: P/1996 F1

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                                                  Circular No. 6349
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 P/1996 F1 (SPACEWATCH)
     J. V. Scotti, Lunar and Planetary Laboratory, reports that he and
J. Montani have recovered comet P/1991 R2 (= 1991x = 1990 XXIX) with the
0.9-m Spacewatch telescope at Kitt Peak.  The nuclear magnitude m2 was
19.6 and 19.4 on Mar. 21.35 and 22.26 UT, respectively; on Mar. 21.35
a 0'.66 tail extended in p.a. 264 deg from a 15" coma.  The indicated
correction to the prediction by S. Nakano on MPC 22032 (ephemeris on
MPC 25984) is Delta T = -2.4 days.

     1996 UT             R.A. (2000) Decl.        m1
     Mar. 21.34514   11 46 51.04   +10 40 46.0
          21.36731   11 46 50.06   +10 41 04.8   17.6
          21.39018   11 46 49.08   +10 41 24.5
          22.24455   11 46 15.44   +10 53 37.0   17.4
          22.25146   11 46 15.16   +10 53 42.9   17.4
          22.26075   11 46 14.75   +10 53 50.8

     The following improved orbital elements, by B. G. Marsden, satisfy
36 observations 1991-1996 with mean residual 0".71:

                    Epoch = 1996 July 16.0 TT
     T = 1996 July 14.5658 TT         Peri. =  87.2733
     e = 0.509139                     Node  = 153.3661  2000.0
     q = 1.539721 AU                  Incl. =   9.9666
       a =  3.136773 AU    n = 0.1774106    P =   5.556 years

1996 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Mar. 18    11 49.06    + 9 52.6    0.918    1.907  171.0    4.7     17.6
     28    11 42.47    +12 13.6    0.884    1.856  161.0   10.1     17.4
Apr.  7    11 36.78    +14 15.8    0.871    1.807  149.6   16.3     17.3
     17    11 33.39    +15 46.0    0.877    1.761  138.8   22.0     17.2
     27    11 33.38    +16 36.7    0.896    1.718  129.0   27.1     17.1
May   7    11 37.24    +16 46.7    0.925    1.678  120.4   31.3     17.1
     17    11 44.95    +16 18.5    0.960    1.643  112.9   34.6     17.1
     27    11 56.25    +15 15.8    0.999    1.612  106.4   37.1     17.1
June  6    12 10.68    +13 42.9    1.041    1.586  100.9   38.9     17.1
     16    12 27.77    +11 44.1    1.085    1.565   96.3   40.2     17.1
     26    12 47.11    + 9 23.3    1.131    1.551   92.3   40.9     17.2
July  6    13 08.31    + 6 45.4    1.180    1.542   88.9   41.2     17.2
     16    13 31.07    + 3 54.9    1.232    1.540   85.9   41.2     17.3

                      (C) Copyright 1996 CBAT
1996 March 22                  (6349)              Brian G. Marsden

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