Central Bureau for Astronomical Telegrams
IAUC 5196: 1991J; 1991K; 1986 III
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Circular No. 5196
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
SUPERNOVA 1991J IN NGC 5020
J. Mueller reports her discovery, on a plate taken Feb. 19 UT
with the 1.2-m Oschin Schmidt Telescope in the course of the second
Palomar Sky Survey by J. D. Mendenhall and herself, of a supernova
of red magnitude about 17 located 33".6 west and 55".8 south of the
center of NGC 5020 (R.A. = 13h10m.2, Decl. = +12 52', equinox
1950.0).
A. V. Filippenko and J. C. Shields, University of California at
Berkeley, report that a CCD spectrum (range 390-700 nm, resolution
1-2 nm), obtained on Feb. 23 UT with the Shane 3-m reflector at Lick
Observatory, shows that SN 1991J is a type-II supernova with well
developed P-Cyg profiles.
SUPERNOVA 1991K IN NGC 2851
R. H. McNaught, University of Adelaide, reports his discovery,
on a U.K. Schmidt Telescope plate taken Feb. 20.55 UT by P. McKenzie,
of a supernova of magnitude R about 18 in NGC 2851. The supernova
is located at R.A. = 9h18m09s.39, Decl. = -16 17'16".0 (equinox
1950.0), or 5" east and 19" south of the galaxy's center. No
star appears in this position on the first Palomar Survey or on UKST
J plates taken in 1983 or 1986. The galaxy is edge-on with a
substantial halo and a weak dust lane. A nearby star of mag about 16.5
is at R.A. = 9h18m11s.39, Decl. = -16 17'30".7.
Filippenko and Shields report: "Preliminary inspection of an
uncalibrated, low-quality spectrum of SN 1991K suggests that it,
too, is a type-II supernova; broad H-alpha emission appears to be
present. However, in a few respects the spectrum also resembles
that of type-Ic supernovae, some of which exhibit weak H-alpha."
PERIODIC COMET HALLEY (1986 III)
K. Meech, Institute for Astronomy, University of Hawaii, confirms
the outburst of comet P/Halley reported on IAUC 5189. CCD
observations with the University of Hawaii 2.2-m telescope during 6.5
hr on Feb. 15 shows the same morphology described on IAUC 5189: a
hemispherically-shaped coma at p.a. 135 deg, extending < 120 000 km
(projected) from the nucleus, with a diameter < 260 000 km.
Preliminary Mould R magnitudes are 20.4 for the central 5" radius and
19.3 for the central 10".
1991 February 23 (5196) Daniel W. E. Green
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