Central Bureau for Astronomical Telegrams
IAUC 3717: Poss. SN IN NGC 7713; N Aql 1982; 1982g; JUPITER VI (HIMALIA)
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Read IAUC 3718
Circular No. 3717
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
POSSIBLE SUPERNOVA IN NGC 7713
J. Maza, Department of Astronomy, University of Chile, telexes
that M. Wischnjewsky has discovered a possible supernova in the Sc
galaxy NGC 7713 (R. A. 23h 33m.8, Decl. -38o 18', equinox 1950.0) on a
plate taken by L. E. Gonzalez at the Cerro el Roble station on July
21. The object, of photographic magnitude 16.0, was located 28"
east and 32" north of the galaxy's nucleus.
NOVA AQUILAE 1982
D. Aitken, P. Roche and B. Whitmore, University College, London,
report that spectra in the range 8-13 um taken on June 20 and
July 4 using the U.K. Infrared Telescope in Hawaii show a strong 10
um emission feature. This feature is attributed to the formation
of silicate grains from material in which the abundance ratio C/O <
1. Sampling of the June 20 spectrum at wavelengths of 8, 9, 10,
11, 12 and 13 um gives fluxes of 3.74, 4.89, 8.77, 8.92, 6.99 and
3.81 mJy, respectively, with errors of less than 0.15 mJy.
Visual magnitude estimates by M. Verdenet, Bourbon-Lancy,
France: June 19.9 UT, 12.1; 29.9, 12.8; July 4.9, 12.7; 8.9, 12.9.
COMET AUSTIN (1982g)
Total visual magnitude estimates and coma diameters: July
6.32 UT, 9.3, 5'.0 (V. F. de Assis Neto, Sao Francisco de Oliveira,
Brazil, 0.10-m reflector; during total lunar eclipse); 14.76, 8.0,
- (A. F. Jones, 0.04-m refractor); 15.74, 7.4, - (Jones); 22.71,
7.0, 6' (A. C. Gilmore, Mt. John Observatory, 0.05-m refractor);
23.79, 6.4, 8' (Gilmore); 25.73, 6.5, - (Gilmore, naked eye);
26.70, 6.4, - (Gilmore, naked eye).
JUPITER VI (HIMALIA)
The following precise positions have been measured by E.
Bowell from exposures obtained at the Lowell Observatory's
Anderson Mesa station:
1982 UT R. A. (1950) Decl.
Apr. 28.31667 14 10 46.37 -11 04 56.5
28.35000 14 10 45.54 -11 04 53.0
1982 July 29 (3717) Brian G. Marsden
Read IAUC 3718
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