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IAUC 4477: 1987 SF3; 1987s

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IAUC number 

                                                  Circular No. 4477
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


1987 SF3
     C. and E. Shoemaker report their discovery of a fast-moving
asteriodal object on films taken with the Palomar 0.46-m Schmidt
telescope.  The Oct. exposures were taken by E. Shoemaker and H.
Holt at Palomar.  The following measurements are by C. Shoemaker:

       1987 UT            R. A.  (1950)    Decl.      Mag.
       Sept.26.29166     0 12 47.88    + 3 42 15.1     16
            26.32083     0 12 52.73    + 3 41 54.6
       Oct. 18.31215     0 50 32.34    + 1 26 05.2
            19.36233     0 51 31.21    + 1 24 32.8
            21.34392     0 53 18.96    + 1 22 39.6

     The following orbital elements are by C. M. Bardwell, Center
for Astrophysics:

         T     = 1987 Aug. 18.3315 ET
         Peri. = 133.6560                   e =   0.534029
         Node  = 187.1222   1950.0          a =   2.248465 AU
         i     =   3.3142                   n =   0.2923310
         q     =   1.047718 AU              P =   3.37 years

     1987 ET      R.A. (1950) Decl.     Delta      r       V
     Oct. 22     0 53.90    + 1 22.6    0.309    1.297    17.6
          27     0 58.07    + 1 24.2
     Nov.  1     1 02.04    + 1 32.9    0.393    1.363    18.4
           6     1 05.99    + 1 47.7
          11     1 10.04    + 2 07.6    0.490    1.433    19.1
          16     1 14.25    + 2 32.0
          21     1 18.68    + 3 00.3    0.600    1.504    19.8


COMET BRADFIELD (1987s)
     Further total visual magnitude estimates (B = binoculars):
Oct. 10.10 UT, 6.2 (J. V. Scotti, Tucson, AZ, 10x50 B); 11.96, 6.4
(D. W. E. Green, North Twin Lake, ME, 20x80 B); 16.02, 6.3 (J.
DeYoung, Rixeyville, VA, 7x50 B); 17.12, 6.3 (C. Spratt, Victoria,
BC, 11x80 B); 18.80, 5.8  (J.-C. Merlin, Le Creusot, France, 7x50
B); 19.08, 6.2 (R. A. Keen, Mt. Thorodin, CO, naked eye); 20.09,
6.1 (Scotti, naked eye; tail > 3 deg in 10x50 B); 22.82, 6.7 (A.
Pereira, Alges, Portugal, 9x34 B); 26.01, 5.9 (G. R. Chester,
Arlington, VA, 7x50 B).


1987 October 26                (4477)            Daniel W. E. Green

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