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IAUC 2812: 1975g; JUPITER

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IAUC number 

                                                  Circular No. 2812
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS


COMET LONGMORE (1975g)
     Dr. A. J. Longmore, Siding Spring Observatory, communicates
the following precise positions, obtained using the southern 122-cm
Schmidt telescope.  Observers were Longmore, P. R. Standen, R. D.
Cannon and M. E. Sim.

     1975 UT             R. A. (1950) Decl.         m1
     June 10.6496     18 54 03.31   -58 42 17.9    17
          11.5831     18 53 00.43   -58 48 16.6
     July  9.5565     18 15 50.37   -59 35 54.4

     Although the distribution of observations is poor, it appears
probable that the comet is yet another short-period one.  The
following orbital elements, by B. G. Marsden, are necessarily uncertain,
but they suggest that the comet made a close approach to Jupiter
in 1963.  Further observations are very much desired.

       T = 1974 Nov. 2.825 ET
   Peri. = 195.402                    e =   0.34904
   Node  =  15.209   1950.0           a =   3.67597 AU
   Incl. =  24.440                    n =   0.139845
       q =   2.39290 AU               P =   7.05 years

     1975 ET     R. A. (1950) Decl.     Delta     r      m1
     July 27    17 58.98    -58 05.1    2.114   2.908   17.8
     Aug.  6    17 54.58    -56 47.7
          16    17 54.18    -55 21.1    2.326   2.972   18.1
          26    17 57.36    -53 51.0
     Sept. 5    18 03.58    -52 20.8    2.590   3.038   18.4
          15    18 12.31    -50 52.2
          25    18 23.03    -49 26.2    2.887   3.104   18.7

             m1 = 11.5 + 5 log Delta + 10 log r


JUPITER
     A cablegram received from the Agrupacion Astronomica, Sabadell,
Spain, reports that Gomez has observed a second disturbance in the
South Equatorial Belt of Jupiter (cf. IAUC 2799).  The disturbance
is at latitude -15o and longitude 208o (System II), and the
observation was made on Aug. 2/3.


1975 August 5                  (2812)              Brian G. Marsden

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