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IAUC 5788: 1993N; HD 98800; 1993J; 1992u

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IAUC number 

                                                  Circular No. 5788
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)


SUPERNOVA 1993N IN UGC 5695
     A. V. Filippenko and T. Matheson, University of California at
Berkeley, report that a relatively noisy spectrum (range 420-700
nm, resolution 0.6 nm) of SN 1993N (cf. IAUC 5784) obtained on May
11 UT with the Shane 3-m reflector at Lick Observatory reveals that
the object is a peculiar type-II supernova similar to SN 1988Z.
The continuum is featureless, and H-alpha consists of three
emission components:  narrow (essentially unresolved), intermediate
(FWZI about 2700 km/s), and broad (FWZI about 19 000 km/s).  No H-
alpha absorption is visible.  SN 1993N is superposed on an H II
region in the parent galaxy; the derived redshift is 2800 km/s.


HD 98800
     S. Rucinski, Space Astrophysics Laboratory, Institute for
Space and Terrestrial Science, North York, ON, writes:  "The
remarkable K5 V star HD 98800, which shows the infrared excess
attributable to zodiacal dust with mass six orders of magnitude greater
than in the solar system (Zuckerman and Becklin 1992, Ap.J. 406,
L25) has been detected as a strong 0.8-mm source with the James
Clerk Maxwell Telescope (+ UKT14) at Mauna Kea on Apr. 25 under
good observing conditions.  The flux density at 0.8 mm is 102 +/-
10 mJy."


SUPERNOVA 1993J IN NGC 3031
     Further visual magnitude estimates:  Mar. 26.995 UT, [17: (O.
Schneider, Bielefeld, Germany; Kodak 2415 film); Apr. 28.90, 11.9
(A. Mizser, Budapest, Hungary); May 1.01, 11.9 (B. H. Granslo,
Fjellhamar, Norway); 4.92, 12.2 (P. Schmeer, Bischmisheim, Germany);
5.94, 12.3 (H. Dahle, Oslo, Norway); 7.88, 12.4 (Schmeer); 11.11,
12.6 (W. G. Dillon, Missouri City, TX); 11.93, 12.3 (J. D. Shanklin,
Cambridge, England).


PERIODIC COMET VAISALA 1 (1992u)
     Total visual magnitude estimates (cf. IAUC 5699):  Mar. 13.31
UT, 12.5 (C. S. Morris, Pine Mountain Club, CA, 0.26-m reflector);
Apr. 14.54, 13.8 (A. Nakamura, Kuma, Japan, 0.60-m reflector);
17.28, 13.2 (Morris); 26.95, 14.2 (H. Mikuz, Ljubljana, Slovenia,
0.20-m Baker-Schmidt camera + V filter + ST-6 CCD).


1993 May 13                    (5788)            Daniel W. E. Green

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