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IAUC 4462: 1987u; 1987i; 1986n

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                                                  Circular No. 4462
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


COMET RUDENKO (1987u)
     Improved parabolic orbital elements from MPC 12309:

         T = 1987 Oct. 9.5290 ET     W = 143.8450
                                     O = 297.8710   1950.0
         q =   0.602471 AU           i = 114.8646

     1987 ET      R.A. (1950) Decl.     Delta      r       m1
     Oct. 12    12 00.90    +12 21.1    1.339    0.605     7.0
          17    11 49.94    + 8 01.9
          22    11 39.69    + 2 54.5    1.204    0.662     7.1
          27    11 30.02    - 3 05.3
     Nov.  1    11 20.56    -10 00.9    1.061    0.774     7.5
           6    11 10.69    -17 54.2
          11    10 59.55    -26 41.4    0.951    0.915     8.0
          16    10 45.85    -36 09.5
          21    10 27.55    -45 52.8    0.915    1.067     8.6
          26    10 01.21    -55 14.3
     Dec.  1     9 20.99    -63 29.5    0.970    1.224     9.3
           6     8 18.45    -69 47.9
          11     6 50.1     -73 15.5    1.107    1.380    10.1
          16     5 16.0     -73 32.0
          21     4 03.9     -71 33.7    1.300    1.534    10.9
          26     3 17.78    -68 38.0
          31     2 49.25    -65 30.4    1.524    1.686    11.7


PERIODIC COMET KLEMOLA (1987i)
     Total visual magnitudes: Aug. 17.25 UT, 11.9 (E. A. Jacobson,
Evansville, MN, 0.25-m reflector); 23.34, 12.4 (C. S. Morris,
Lockwood Valley, CA, 0.26-m reflector); 29.97, 13.7 (M. Amoretti,
San Remo, Italy, 0.35-m reflector); Sept. 2.39, 12.6 (A. Hale, Las
Cruces, NM, 0.41-m reflector); 14.17, 12.7 (Jacobson); 17.30, 12.7
(Hale); 20.34, 12.5 (Morris); 23.36, 12.4 (R. Keen, Boulder, CO,
0.32-m reflector); 27.24, 12.8 (Morris); Oct. 1.33, 12.9 (Keen).


COMET SORRELLS (1986n)
     Total magnitudes: Aug. 15.23 UT, 11.7 (Hale); 16.25, 11.5
(Morris); 17.22, 11.9 (Jacobson); 19.28, 11.9 (Jacobson); 23.26,
11.8 (Morris); 28.22, 12.2 (Hale); 31.21, 11.7 (Jacobson).


1987 October 3                 (4462)              Brian G. Marsden

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