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IAUC 3926: 1984d; 1983v

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IAUC number 

                                                  Circular No. 3926
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 RUSSELL (1984d)
     K. S. Russell, U.K. Schmidt Telescope Unit, reports his
discovery of another comet on a Mar. 7 exposure by M. Hawkins.  He
was also able to locate the object on prism plates obtained some
days earlier, but the derived positions must be of somewhat lower
accuracy.  The comet has a noticeable tail, perhaps 5' long.

      1984 UT             R.A.   (1950.0)    Decl.      m1

      Mar.  2.73856     13 32 38.66     + 0 36 49.5     13
            4.74591     13 32 26.14     + 0 40 59.9
            7.72909     13 31 54.33     + 0 47 56.2

     Although the orbit is currently rather indeterminate, it
seems likely that it is of short period.  The following parabolic
and representative elliptical elements are by the undersigned.
The ephemeris is from the ellipse.

         T = 1983 Dec. 3.25 ET      T = 1984 Sept. 3.53 ET
     Peri. =  48.18             Peri. = 222.18
     Node  =  88.25   1950.0    Node  =  52.59   1950.0
     Incl. =   5.70             Incl. =   8.23
         q =   1.7720 AU            q =   1.4918 AU
         e =   1.0                  e =   0.5582

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

     Mar.  1    13 32.73    + 0 33.6    1.496    2.328    13.0
          11    13 31.02    + 0 56.5
          21    13 26.33    + 1 28.1    1.245    2.203    12.4
          31    13 18.81    + 2 03.4
     Apr. 10    13 09.14    + 2 35.0    1.085    2.078    11.9


PERIODIC COMET HARTLEY-IRAS (1983v)
     S. Larson, Lunar and Planetary Laboratory, reports that
observations comparable to those for P/Crommelin (cf. IAUC 3921)
showed emissions of OH, NH, CN, C3 and C2.

     Further total visual magnitude estimates: Feb. 29.55 UT, 8.5
(C. S. Morris, Angeles Crest Highway--not Los Angeles Crest
Highway, as was given on IAUC 3920--CA, 20 x 80 binoculars); Mar.
1.40, 8.8 (D. W. E. Green, Harvard College Observatory, 0.23-m
refractor); 2.42, 8.7 (J. Bortle, Stormville, NY, 20 x 80
binoculars); 3.40, 8.7 (Green); 8.41, 9.3 (Bortle).


1984 March 9                   (3926)              Brian G. Marsden

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