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IAUC 3271: 1978j; 1977g

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IAUC number 

                                                  Circular No. 3271
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 617-864-5758


PERIODIC COMET HANEDA-CAMPOS (1978j)
     Further precise positions have been reported as follows:

     1978 UT             R. A. (1950) Decl.        m1    Observer
     Aug. 10.33056    20 41 14.08   -19 35 44.2  13-14   Helin
     Sept. 2.53854    20 52 24.28   -29 59 05.7   10     Koishikawa
           2.54236    20 52 25.3    -29 59 10            Furuta
           2.54583    20 52 25.46   -29 59 20.7            "
           2.56285    20 52 26.67   -30 00 00.0          Koishikawa
          12.65636    21 14 25.71   -35 49 36.6   10     Stuart
          12.71307    21 14 35.40   -35 51 30.2          Jekabsons

E. Helin  and S. J. Bus (Palomar Mountain Observatory).  46-cm
   Schmidt.  Prediscovery observation.  Very diffuse and uncondensed.
   Exposures with the 122-cm Schmidt (limiting magnitude
   19.5) dunng July 10-14 show no trace of the comet.
M. Koishikawa (Sendai Observatory, Ayashi Station).  20-cm f/5.5
   reflector.  From Japan Astron. Circ. No. 170.
T. Furuta (Kagiya). From Yamamoto Circ. Nos. 1892 and 1894.
Stuart and P. Jekabsons (Perth Observatory, Bickley).

     The following orbital elements depend on different prediscovery
observations, which are somewhat inconsistent.  The second solution
implies approaches to 0.3-0.4 AU from Jupiter in 1957 and 1969.

          M. P. Candy                        B. G. Marsden
   (15 obs. Aug. 11-Sept. 12)          (14 obs. Aug. 10-Sept. 12)
      T = 1978 Oct. 9.4785                1978 Oct. 9.4932 ET
  Peri. = 240.3578                        240.4182
  Node  = 131.6857                        131.5965   1950.0
  Incl. =   5.8549                          5.9582
      q =   1.099656                        1.101528 AU
      e =   0.649342                        0.665975
      a =   3.135979                        3.297742 AU
      n =   0.1774779                       0.1645807
      P =   5.553                           5.989 years


PERIODIC COMET ASHBROOK-JACKSON (1977g)
     Total visual magnitude estimates: Sept. 7.27 UT, 11.9 (P. L.
Collins, Mount Hopkins Observatory, 20-cm reflector); 10.31, 11.7
(J. Bortle, Brooks Observatory, 32-cm reflector; 10' tail p.a. 245o).


1978 September 19              (3271)              Brian G. Marsden

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