IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 2711: JUPITER XIII

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).


Read IAUC 2710  SEARCH Read IAUC 2712
IAUC number


                                                  Circular No. 2711
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


JUPITER XIII
     Dr. M. Schmidt, Hale Observatories, telegraphs the following
positions, obtained by C. Kowal with the 122-cm Schmidt telescope:

     1974 UT             R. A. (1950) Decl.        mpv
     Oct. 17.23472    22 37 17.3    - 9 53 47      20
          18.24236    22 37 07.3    - 9 54 04

     The following jovicentric orbit, by K. Aksnes, Center for
Astrophysics, Harvard and Smithsonian Observatories, satisfies the
seven available observations (cf. IAUC 2702, 2703) within 1".5:

       T = 1974 July 16.88 ET
   Peri. = 267.96                     e =   0.1053
   Node  = 249.18   1950.0            a =   0.0829 AU
   Incl. =  24.95                     n =   1.2764
       q =   0.074  AU                P = 282.0 days

Solar perturbations were ignored, and the observations may be satisfied
equally well with an orbit having e = 0.3.  The above orbit is
similar to those of Jupiter VI, VII and X.  A retrograde orbit does
not give a satisfactory fit to the observations, and the least-squares
heliocentric orbit - determined by the undersigned - gives
e = 1.19 +/- 0.06.  Further observations at the November (and if
possible at the December) dark run will be essential if a reliable
ephemeris is to be provided for the 1975 opposition.

     1974 ET     R. A. (1950) Decl.
     Oct. 30    22 36.18    - 9 52.2
     Nov.  4    22 36.35    - 9 48.5
           9    22 36.85    - 9 43.2
          14    22 37.68    - 9 36.1
          19    22 38.83    - 9 27.5
          24    22 40.29    - 9 17.3
          29    22 42.04    - 9 05.7
     Dec.  4    22 44.06    - 8 52.6
           9    22 46.35    - 8 38.2
          14    22 48.89    - 8 22.6
          19    22 51.65    - 8 05.7
          24    22 54.63    - 7 47.6
          29    22 57.81    - 7 28.5


1974 October 24                (2711)              Brian G. Marsden

Read IAUC 2710  SEARCH Read IAUC 2712


Our Web policy. Index to the CBAT/MPC/ICQ pages.


Valid HTML 4.01!