Central Bureau for Astronomical Telegrams
IAUC 5570: 1992n; 1992am; 1992ad
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Read IAUC 5571
Circular No. 5570
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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)
PERIODIC COMET SCHUSTER (1992n)
S. Nakano, Sumoto, Japan, reports the recovery of this comet
by T. Seki at Geisei. The comet is small and diffuse without nucleus;
there was a faint tail in p.a. 245 deg on July 29. The indicated
correction to the elements on MPC 14594 (ephemeris on MPC
19707) is Delta(T) = +0.04 day.
1992 UT R.A. (2000) Decl. m1
July 28.74375 3 55 36.60 +10 56 14.7 18
28.75660 3 55 38.81 +10 56 28.0
29.76597 3 58 20.07 +11 13 47.8 18
29.77517 3 58 21.61 +11 13 55.4
SUPERNOVA 1992am IN ANONYMOUS GALAXY
M. Phillips, Cerro Tololo Interamerican Observatory; and J.
Maza, University of Chile, report the discovery by R. Antezana
(University of Chile) of a supernova located about 19".3 west and
1".4 south of the nucleus of a spiral galaxy at R.A. = 1h22m32s,
Decl. = -4 54'.6 (equinox 1950.0). The supernova, of mpg about
18.5, was found on a 20-min unfiltered IIa-O plate taken by L.
Wells and C. Muena (CTIO) with the CTIO Curtis Schmidt telescope on
July 26.326 UT. Confirmation was made by N. Tyson and R. Gal
(Princeton University) on B and V images obtained on July 29.42
with the CTIO 0.9-m telescope. A spectrogram (range 320.0-750.0
nm) was obtained by M. Phillips (CTIO) and A. Alonso (Columbia
University) on July 29.39 with the CTIO 4-m telescope, showing that
this is a normal type-II supernova with broad P-Cyg lines of H I
and Fe II. The redshift of the parent galaxy is 0.048.
SUPERNOVA 1992ad IN NGC 4411B
W. Liller, Vina del Mar, Chile, reports that SN 1992ad appears
as a pre-discovery image of mv = 14.0 on a technical pan film taken
June 29.98 UT. Visual magnitude estimates: July 3.09 UT, 13.6 (M.
Adams, Melbourne, FL); 3.11, 13.5 (B. Wilson, Columbus, TX); 3.11,
13.5 (P. Sventek, Columbus, TX); 3.21, 13.8 (A. Hale, Las Cruces,
NM); 3.42, 13.5 (P. Camilleri, Cobram, Victoria, Australia); 4.37,
13.5 (Camilleri); 7.90, 13.3 (S. Pesci, Milan, Italy); 19, 13.8 (R.
Evans, Hazelbrook, N.S.W.); 21, 13.8 (Evans); 22, 13.8 (Evans).
1992 July 30 (5570) Daniel W. E. Green
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