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IAUC 4439: 1986l; 1987p

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                                                  Circular No. 4439
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 WILSON (1986l)
     D. K. Lynch informs us that he is compiling a data log for
this comet, his purpose being to maintain a list of when various
types of observation were made, in order to help other astronomers
in their own work.  Entries for the log, consisting of the UT date
(to 0.1 day), a one or two line description (noting in particular
the instrument used and range of wavelengths) and the observer's
name and affiliation, should be sent to him at The Aerospace
Corporation, MS M2-266, P.O. Box 92957, Los Angeles, CA 90009, U.S.A.
Contributors will receive a copy of the final log.
     Total visual magnitude estimates: June 19.88 UT, 8.6 (V. F.
de Assis Neto, Sao Francisco de Oliveira, Brazil, 10 x 70
binoculars); 28.48, 8.5 (G. W. Wolf, Wellington, N.Z., 0.06-m refractor);
July 10.29, 8.5 (Wolf); 21.29, 9.0 (Wolf); 29.29, 9.3 (Wolf).


PERIODIC COMET BORRELLY (1987p)
     Ephemeris from the orbital elements on MPC 10522:

     1987/88 ET   R.A. (1950) Decl.     Delta      r       m1
     Sept. 2     3 12.36    -34 37.4    1.159    1.808    13.2
          12     3 24.82    -35 58.1
          22     3 34.17    -37 14.1    0.959    1.677    12.3
     Oct.  2     3 39.50    -38 14.2
          12     3 39.96    -38 41.9    0.782    1.560    11.4
          22     3 34.86    -38 14.4
     Nov.  1     3 24.23    -36 18.5    0.628    1.463    10.5
          11     3 09.38    -32 15.1
          21     2 52.80    -25 29.1    0.516    1.393     9.7
     Dec.  1     2 37.79    -15 53.3
          11     2 27.10    - 4 17.4    0.485    1.359     9.4
          21     2 22.24    + 7 42.5
          31     2 23.76    +18 37.4    0.564    1.365     9.8
     Jan. 10     2 31.47    +27 45.6
          20     2 45.01    +35 05.6    0.727    1.409    10.5
          30     3 04.05    +40 52.6
     Feb.  9     3 28.13    +45 22.3    0.936    1.486    11.4
          19     3 56.74    +48 46.0
          29     4 29.21    +51 11.9    1.172    1.590    12.4
     Mar. 10     5 04.47    +52 44.8
          20     5 41.29    +53 29.0    1.426    1.711    13.3


1987 August 20                 (4439)              Brian G. Marsden

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