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IAUC 3970: 1984j

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                                                  Circular No. 3970
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 TAKAMIZAWA (1984j)
     Further precise positions have been reported as follows:

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

   July 26.68125   21 13 33.0    -17 47 56      6.5   Seki
        26.70625   21 13 32.4    -17 48 16              "
   Aug.  2.69392   21 11 38.62   -19 24 31.6    9.5     "
         2.74549   21 11 37.47   -19 25 11.2            "
         3.29826   21 11 28.19   -19 32 38.1          Skiff
         3.30625   21 11 28.00   -19 32 44.2            "
         4.62604   21 11 03.56   -19 50 02.4    9     Saito
         4.65104   21 11 03.16   -19 50 21.0            "

T. Seki (Geisei).  Prediscovery image on July 26 shows the comet to
   be extremely condensed with a tail ~ 1 deg long in p.a. 270.
B. A. Skiff (Lowell Observatory, Anderson Mesa Station).  0.33-m
   photographic telescope.  Fanshaped tail to the northwest.
K. Saito (Tokyo Dodaira Station).  Measurer: H. Kosai.

     Computations by S. Nakano, Tokyo, and the undersigned confirm
that the comet is a short-period one.  The ephemeris (mainly
prediscovery) is from the new elements by the undersigned.

              S. Nakano                  B. G. Marsden
       T = 1984 May 23.508 ET       T = 1984 May 26.570 ET
   Peri. = 145.558              Peri. = 147.884
   Node  = 124.085   1950.0     Node  = 124.001   1950.0
   Incl. =   9.178              Incl. =   9.010
       q =   1.55821 AU             q =   1.56860 AU
       e =   0.58314                e =   0.54920
       (12 obs. July 26-Aug. 2)     (14 obs. July 26-Aug. 4)

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

     June  9    20 49.83    - 9 51.9    0.752    1.575     8.9
          19    21 01.58    -10 38.0
          29    21 09.63    -11 56.8    0.684    1.605     8.7
     July  9    21 13.88    -13 46.8
          19    21 14.72    -15 59.3    0.667    1.659     8.8
          29    21 12.98    -18 20.3
     Aug.  8    21 10.03    -20 32.4    0.720    1.732     9.2
          18    21 07.40    -22 21.2
          28    21 06.29    -23 38.9    0.850    1.822     9.8


1984 August 7                  (3970)              Brian G. Marsden

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