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IAUC 5856: 1993 FW

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                                                  Circular No. 5856
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
     Further precise positions have been reported as follows:

     1993 UT             R.A. (2000) Decl.         R    Observer
     May  17.35082   12 23 58.68   - 2 38 22.6          Hainaut
          17.39862   12 23 58.55   - 2 38 22.0          Byun
          18.01676   12 23 56.96   - 2 38 09.8            "
     June 25.05761   12 23 19.44   - 2 32 50.2   23.8   Marconi

Y.-I. Byun (Mauna Kea).  2.2-m reflector + CCD.  Measurers J. Luu
   and D. Jewitt.
O. Hainaut and G. Marconi (European Southern Observatory).  1.5-m Danish
   reflector and 3.6-m NTT + CCD.  Measurers R. M. West and O. Hainaut.

     The orbit of this object is still very indeterminate, but the
following result, derived by the undersigned from the 11 available
observations (cf. IAUC 5730, 5796), suggests the low orbital eccentricity
and general similarity to the orbit of 1992 QB1 (cf. IAUC 5855).  The
object is assumed to have been at perihelion at discovery.  Further
observations are very necessary, however, and observers should attempt
a recovery as soon as the object returns to the morning sky and is still
in direct motion.

     T = 1993 Mar. 28.180 TT          Peri. = 359.501
     e = 0.04066                      Node  = 187.914   2000.0
     q = 42.1448 AU                   Incl. =   7.745
       a = 43.9311 AU     n = 0.0033849     P = 291.2 years

1993/94     R. A. (2000) Decl.     Delta      r    Elong. Phase      V
Nov. 19    12 34.13    - 3 37.7   42.806   42.145   47.5    1.0     23.4
     29    12 34.79    - 3 41.6   42.668   42.145   57.4    1.1     23.4
Dec.  9    12 35.32    - 3 44.7   42.513   42.145   67.4    1.2     23.4
     19    12 35.72    - 3 46.9   42.347   42.145   77.5    1.3     23.4
     29    12 35.98    - 3 48.1   42.175   42.145   87.6    1.3     23.4
Jan.  8    12 36.08    - 3 48.4   42.001   42.145   97.8    1.3     23.4
     18    12 36.03    - 3 47.8   41.831   42.145  108.0    1.3     23.4
     28    12 35.83    - 3 46.2   41.671   42.145  118.2    1.2     23.4
Feb.  7    12 35.49    - 3 43.7   41.525   42.145  128.4    1.1     23.4
     17    12 35.03    - 3 40.4   41.398   42.145  138.7    0.9     23.4
     27    12 34.47    - 3 36.4   41.294   42.145  148.9    0.7     23.3


1993 September 4               (5856)              Brian G. Marsden

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