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IAUC 5796: 1993 FW; 1993J

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                                                  Circular No. 5796
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


1993 FW
     No observations seem to have been made of this interesting new
slow-moving object (cf. IAUC 5730) during the April dark run.  The
object was detected in three CCD images obtained on May 17 by O.
Hainaut with the 1.54-m Danish reflector at the European Southern
Observatory, and the following measurements are by R. M. West:

     1993 UT             R.A. (2000) Decl.        V
     May  17.03238   12 23 59.43   - 2 38 27.7    23
          17.05998   12 23 59.36   - 2 38 27.3
          17.09281   12 23 59.27   - 2 38 26.7

     B. G. Marsden, Center for Astrophysics, remarks that these
observations constrain the geocentric distance to the range 39-48 AU,
and that observations at both the June and July dark runs will be
necessary for establishing the orbit with any reliability.  He
provides the following improved circular elements:

 Epoch = 1993 May 13.0 TT         Arg.Peri. = 359.676
                                      Node  = 187.902   2000.0
     a = 42.340 AU                    Incl. =   7.925

1993 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    V
May   3    12 24.69   - 2 43.5  41.519  42.340  144.1    0.8   23.4
     13    12 24.17   - 2 39.8  41.628  42.340  134.3    1.0   23.4
     23    12 23.76   - 2 36.8  41.758  42.340  124.5    1.1   23.4
June  2    12 23.47   - 2 34.6  41.904  42.340  114.8    1.2   23.4
     12    12 23.31   - 2 33.2  42.062  42.340  105.2    1.3   23.4
     22    12 23.29   - 2 32.8  42.227  42.340   95.7    1.4   23.4
July  2    12 23.42   - 2 33.2  42.396  42.340   86.2    1.4   23.5
     12    12 23.68   - 2 34.6  42.562  42.340   76.7    1.3   23.5
     22    12 24.08   - 2 36.8  42.722  42.340   67.3    1.3   23.5
Aug.  1    12 24.60   - 2 39.9  42.871  42.340   57.8    1.2   23.5


SUPERNOVA 1993J IN NGC 3031
     Photometry by H. Mikuz, B. Dintinjana, and T. Zwitter,
Ljubljana, Slovenia (comparison stars from Corwin, IAUC 5742):
May 16.87 UT, V = 12.39 +/- 0.02, B = 13.47 +/- 0.03, R = 11.65
+/- 0.02, I = 11.21 +/- 0.03.


1993 May 18                    (5796)            Daniel W. E. Green

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