Central Bureau for Astronomical Telegrams
IAUC 4052: 1985G; 1985H; 1984f
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Circular No. 4052
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 617-495-7244/7440/7444
SUPERNOVA 1985G IN NGC 4451
A. Chalabaev and E. Zuiderwijk, European Southern Observatory;
F. Giovannelli, Istituto di Astrofisica Spaziale, Frascati;
A. Vittone, Naples; and S. di Serego, European Space Agency,
telex: "An observation made at La Silla on Apr. 10 indicates this
object is a type II supernova. An image-dissector-scanner spectrum
taken at the 1.5-m telescope (dispersion 114 A/mm) shows HS
with a P-Cyg profile. The blue edge of the absorption corresponds
to an expansion velocity of ~ 13 000 km/s. Infrared photometry at
the 1-m telescope gives J = 15.4 +/- 0.4. Direct imaging of NGC
4451 with the ESA photon-counting detector at the 2.2-m telescope
reveals this galaxy to be a normal Sc spiral, contrary to
classifications in the RNGC (elliptical) and in the Second Reference
Catalogue of Bright Galaxies (lenticular, LA). The supernova is
located in the inner spiral arm."
SUPERNOVA 1985H
Conflicting reports have been received concerning the reality
of the supposed supernova in NGC 3359 (IAUC 4050), but any
supernova must evidently be no brighter than mag 15.
COMET SHOEMAKER (1984f)
A visual magnitude estimate by C. S. Morris at Table Mountain
Observatory (0.61-m reflector) on Apr. 13.38 UT gave m1 = 11.0.
The comet was fairly well condensed, and there was a fan tail
~ 15" long in p.a. 225. Ephemeris from the orbit on MPC 9426:
1985 ET R.A. (1950.0) Decl. p r m1
Apr. 5 15 18.17 -33 19.0 2.320 3.124 10.8
15 14 50.89 -35 35.3
25 14 17.57 -37 18.1 2.082 3.027 10.4
May 5 13 40.73 -38 07.9
15 13 04.25 -37 58.7 2.062 2.940 10.3
25 12 31.82 -37 02.8
June 4 12 05.44 -35 42.8 2.237 2.864 10.3
14 11 45.34 -34 19.9
24 11 30.76 -33 08.2 2.519 2.801 10.5
July 4 11 20.64 -32 14.9
14 11 13.96 -31 42.3 2.823 2.752 10.7
1985 April 15 (4052) Brian G. Marsden
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