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IAUC 4766: 1989 FB

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                                                  Circular No. 4766
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 or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


1989 FB
     C. S. and E. M. Shoemaker report that H. E. Holt and N. G. Thomas
have discovered a fast-moving asteroidal object on 0.46-m Schmidt
telescope films taken at Palomar.  An independent discovery was made
by E. F. Helin and B. Roman with the same telescope.  The Holt-Thomas
films were measured by S. J. Bus and H. E. Holt and the positions were
communicated by E. Bowell; the Apr. 5 and 6 films were measured
by Roman.

     1989 UT             R.A. (1950) Decl.       Mag.   Observer
     Mar. 31.43056   13 25 54.04   + 4 33 32.8   16.5   Holt
     Apr.  1.36962   13 22 20.03   + 4 23 59.8           "
           3.43056   13 14 12.40   + 4 01 16.3           "
           4.42083   13 10 11.37   + 3 49 33.3           "
           5.36302   13 06 18.57   + 3 37 58.7   16.2   Helin
           6.34080   13 02 13.78   + 3 25 19.3            "

     The following preliminary orbital elements by B. G. Marsden,
Center for Astrophysics, show that this is an Apollo-type object:

     T = 1989 Sept.16.12 ET           Peri. = 333.53
     e = 0.2641                       Node  =  23.22    1950.0
     q = 0.7692 AU                    Incl. =  15.15
       a =  1.0453 AU      n = 0.92223      P =   1.07 years

     1989 ET      R.A. (1950) Decl.     Delta      r       V
     Apr.  4    13 11.92    + 3 54.9    0.305    1.301    15.5
           5    13 07.82    + 3 42.7
           6    13 03.66    + 3 30.0    0.301    1.298    15.4
           7    12 59.45    + 3 16.8
           8    12 55.20    + 3 03.1    0.298    1.296    15.4
           9    12 50.91    + 2 48.8
          10    12 46.61    + 2 34.0    0.296    1.292    15.5
          11    12 42.29    + 2 18.8
          12    12 37.97    + 2 03.1    0.294    1.289    15.5
          13    12 33.66    + 1 46.9
          14    12 29.37    + 1 30.4    0.294    1.286    15.6
          15    12 25.11    + 1 13.4
          16    12 20.90    + 0 56.2    0.294    1.282    15.7


1989 April 7                   (4766)             Daniel W. E. Green

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