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IAUC 2845: Prob. NEW Sat OF JUPITER; 1975g

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                                                  Circular No. 2845
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


PROBABLE NEW SATELLITE OF JUPITER
     C. Kowal, Hale Observatories, reports the discovery of a probable
new satellite of Jupiter on plates taken with the 122-cm
Schmidt telescope at Palomar.  The offset from Jupiter is approximately
dR.A. = -2m.9, dDecl. = +20'.

     1975 UT          R. A. (1950) Decl.      mpv
     Sept.30.312      1 17.4     + 7 03       21
     Oct.  1.317      1 16.9     + 7 00
           2.394      1 16.5     + 6 57


PERIODIC COMET LONGMORE (1975g)
     A. J. Longmore, U.K. Schmidt Telescope Unit, Siding Spring
Observatory, communicates the following observation by T. Hawarden:

     1975 UT             R. A. (1950) Decl.        m1
     Aug.  6.4627     17 54 26.42   -56 43 11.4    19

     This confirms that the comet is a new short-period one.  The
following elements, by the undersigned, are from the four photographic
positions.  Corrections are provided to the ephemerides on
IAUC 2812 and 2838.  A prediscovery ephemeris is also provided for
the opposition in early 1974, when m1 should have been about 18-19.

       T = 1974 Nov. 4.3357 ET
   Peri. = 196.2604                   e =   0.342243
   Node  =  15.0082   1950.0          a =   3.651835 AU
   Incl. =  24.4023                   n =   0.1412334
       q =   2.402021 AU              P =   6.979 years

     1975 ET    dR.A. dDecl.   1974 ET   R.A. (1950.0) Decl.
     Aug. 16     0m00  +1'0    Jan. 13   10 52.43   +38 58.3
     Sept. 5    +0.05  +1.8         23   10 47.68   +39 54.4
          25    +0.13  +2.7    Feb.  2   10 39.92   +40 42.8
     Oct. 15    +0.22  +3.6         12   10 29.72   +41 14.4
     Nov.  4    +0.31  +4.6         22   10 18.07   +41 20.9
          24    +0.40  +5.8    Mar.  4   10 06.35   +40 57.1
     Dec. 14    +0.48  +7.0         14    9 55.93   +40 02.8


1975 October 3                 (2845)              Brian G. Marsden

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