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                                                  Circular No. 3789
Central Bureau for Astronomical Telegrams
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

     On Apr. 6 UT H. Kosai and Y. Kozai, Tokyo Astronomical
Observatory, reported the unconfirmed discovery, by Kiyomi Okazaki,
Kahoku-machi, Yamagata, of a supernova some 0'.1 southwest of the
nucleus of NGC 4753; a Tri-X exposure on Apr. 4.64 UT with a
0.25-m Wright-type Schmidt camera showed the object at V ~ 13, and
the object was again present on Apr. 5.69 UT.  Before confirmation
became available the supernova was independently discovered by
Robert Evans, Maclean, N.S.W., who detected it visually (at mag
13.0) on Apr. 6.6 UT at an estimated 40" southwest of the galaxy's
nucleus.  A confirmatory observation by G. Thompson, Brisbane,
soon afterward gave the offset as 10" west, 20" south.  Kosai's
accurate measurement of Okazaki's Apr. 4.64 exposure yielded the
position: R.A. = 12h49m47s23, Decl. = -0deg55'54".2 (equinox 1950.0).

     R. W. Argyle, Royal Greenwich Observatory, telexes that J. E.
Sinclair has measured the following accurate position of the NGC
3044 supernova (cf. IAUC 3787) from a Herstmonceux exposure on
Mar. 31.85 UT: Decl. = 9h51m08s05, Decl. = +1deg48'45".2 (equinox
1950.0)  The offset from the nucleus was given as 29" east, 11" south,
and the photographic magnitude was ~ 15.

     R. Suggs and R. Beebe, Department of Astronomy, New Mexico
State University, write: "Photographic plates obtained on Mar. 28
by A. S. Murrell at Tortugas Mountain Observatory show a bright,
white cloud in Saturn's northern hemisphere visible in blue, green
and red light.  The cloud is at a planetographic latitude of +38 deg,
and its west end was 10 deg east of Saturn's central meridian on Mar.
28d10h36m UT.  These figures are based on measurements of three
images in red light and have an uncertainty of ~ +/- 2 deg.  According
to Voyager observations, the peak zonal wind speed at a latitude
of +40 deg is -17 m/s,  indicating a rotation period of 10h41m.   This
feature is probably similar to the convective feature observed by
the Voyagers at this latitude and described in Fig. 6 of Smith et
al. (1982, Science 215, 507)."

1983 April 7                   (3789)              Brian G. Marsden

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