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IAUC 3605: 1981 JD; NEPTUNE APPULSE; Sats OF SATURN

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                                                  Circular No. 3605
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


1981 JD
     C. T. Kowal, California Institute of Technology, reports his
discovery of a fast-moving asteroidal object on an exposure with
the 1.2-m Schmidt telescope at Palomar as follows:

     1981 UT             R. A. (1950) Decl.       Mag.
     May   9.41250    17 58 02.61   +68 31 51.1   16
           9.47500    17 56 11.00   +68 26 00.9

The positions refer to the beginning and end of the trail and could
therefore be reversed.


NEPTUNE APPULSE
     W. B. Hubbard, Lunar and Planetary Laboratory, informs us that
no occultation events were observed during the Neptune appulse on
May 10 (Mink et al. 1981, A.J. 86, 135) from three stations near
Tucson, AZ, and from San Pedro Martir California.  Coverage
was continuous at both locations from 10h30m to 12h10m UT, and 2-um
observations near Tucson continued until 12h20m.


SATELLITES OF SATURN
     The observation in Flagstaff on 1980 Mar. 15.35 UT (IAUC 3534)
is given the provisional designation 1980 S 32.

     L. A. Morabito and S. P. Synnott, Voyager Project, Jet Propul-
sion Laboratory, provide information about the Voyager 1 observation
on 1980 Nov. 7.33 UT, to which allusion was made on IAUC 3603.
If this satellite, designated 1980 S 33, is assumed to move in the
orbit of Saturn III (Tethys), it would have preceded Saturn III in
longitude by 59o.3  The object was ~ 1o above the equatorial plane
and similar in size to 1980 S 28, or 40 km across.

     The identifications of satellites with the triangular libration
points of Tethys were given incorrectly on IAUC 3603.  They
should have been: for the L4 point, 1980 S 13 = 1980 S 24 = 1980
S 33 = 1981 S 1; and for the L5 point, 1980 S 25 = 1980 S 29 = 1980
S 30 = 1980 S 32 = 1981 S 2.  B. A. Smith, Lunar and Planetary Laboratory,
remarks that 1980 S 25 has also been identified on 1980
Mar. 1, that the fits to 1980 S 24 and 1980 S 29 are doubtful and
that those to 1980 S 30 and 1980 S 32 are not particularly good.


1981 May 18                    (3605)              Brian G. Marsden

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