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IAUC 3972: 1984k; 1984i

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IAUC number 

                                                  Circular No. 3972
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


PERIODIC COMET AREND-RIGAUX (1984k)
     This comet has been recovered as follows:

  1984 UT           R.A.  (1950.0)  Decl.       m2      Observer

  Aug.  7.44239    3 48 17.84   + 0 47 55.2    18.5     Gibson
        8.41739    3 50 34.31   + 0 49 11.0               "
        8.76667    3 51 24.35   + 0 49 53.9   18-18.5   Seki

J. Gibson (Palomar Mountain Observatory).  12-min exposures with
   the 1.2-m Schmidt show the object to be of stellar appearance.
   A 24-min exposure on Aug. 6 shows a hint of a very faint tail
   1'-2' long in p.a. 255.
T. Seki (Geisei).  Stellar appearance.  Communicated by S. Nakano.

     The Palomar observations indicate that the object is precisely
in the position predicted on MPC 7659.  An ephemeris follows:

     1984/85 ET  R.A. (1950.0) Decl.      p        r       m1

     Sept.17     5 27.52    + 0 08.5    1.281    1.661    13.8
          27     5 52.86    - 0 25.7
     Oct.  7     6 18.11    - 1 04.1    1.082    1.568    13.1
          17     6 43.05    - 1 41.3
          27     7 07.33    - 2 11.2    0.914    1.498    12.4
     Nov.  6     7 30.57    - 2 25.1
          16     7 52.37    - 2 13.7    0.774    1.456    11.9
          26     8 12.21    - 1 25.8
     Dec.  6     8 29.51    + 0 10.7    0.660    1.447    11.5
          16     8 43.73    + 2 46.5
          26     8 54.25    + 6 28.1    0.582    1.471    11.3
     Jan.  5     9 00.80    +11 11.0
          15     9 03.59    +16 32.7    0.563    1.527    11.5
          25     9 03.42    +21 55.7
     Feb.  4     9 01.91    +26 39.3    0.629    1.608    12.1
          14     9 00.80    +30 17.4
          24     9 01.49    +32 43.4    0.780    1.710    13.0


COMET AUSTIN (1984i)
     Total visual magnitude estimates and tail (in p.a. 129)
lengths by R. H. McNaught, Siding Spring Observatory: Aug. 1.37
UT, 5.6, 2.4 deg (9 x 63 binoculars); 3.36, 5.1, 3.1 deg; 7.36, 5.2, 0.2
deg (10 x 80 binoculars; very low altitude, slight haze and twilight).


1984 August 10                 (3972)              Brian G. Marsden

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