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IAUC 7283: 1999 U1; 1999ei

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                                                  Circular No. 7283
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET 1999 U1
     LONEOS reports the discovery of a new comet.  Additional
observations were reported following posting on the NEO
Confirmation Page:

     1999 UT             R.A. (2000) Decl.        m1    Observer
     Oct. 18.38023    4 38 39.47   + 8 25 00.4   17.3   Ferris
          18.40064    4 38 38.50   + 8 25 04.1            "
          18.42104    4 38 37.37   + 8 25 06.7            "
          18.93387    4 38 11.62   + 8 26 35.8          Pravec
          18.94006    4 38 11.30   + 8 26 36.4            "
          18.96318    4 38 10.13   + 8 26 40.8   17.2   Tichy
          18.96468    4 38 10.09   + 8 26 41.2            "
          18.96627    4 38 09.98   + 8 26 42.1            "
          18.96826    4 38 09.84   + 8 26 42.6            "
          18.96992    4 38 09.81   + 8 26 42.4            "

W. D. Ferris (Lowell Observatory).  Measurer B. W. Koehn.  0.59-m
   LONEOS Schmidt + CCD.
P. Pravec and P. Kusnirak (Ondrejov).  0.65-m f/3.6 reflector + CCD.
   Coma diameter 20"; broad tail to the south.
M. Tichy and Z. Moravec (Klet).  0.57-m f/5.2 reflector + CCD.
   Coma diameter 10" and faint 1' tail in p.a. 140 deg.


SUPERNOVA 1999ei IN ANONYMOUS GALAXY
     J. Maza, University of Chile; and M. Hamuy, University of
Arizona, report the discovery by M. Wischnjewsky, on a 20-min
unfiltered T-Max 400 film taken by L. Gonzalez on Oct. 8.34 UT with
the University of Chile's Maksutov telescope, of a supernova
(m_pv about 17.5) located at R.A. = 1h33m52s.30, Decl. =
-28o41'57".0 (equinox 2000.0), which is about 8" west and 1" south
of the nucleus of the host galaxy.  The supernova was confirmed by
P. Candia (Cerro Tololo Interamerican Observatory) from B, V, and I
images taken with the Cerro Tololo 0.9-m telescope on Oct. 12.12.
Further images obtained on Oct. 13.20 by Hamuy with the same
telescope give B = 17.4 and V = 17.0.  M. M. Phillips (Carnegie
Observatories) obtained a spectrogram (range 380-900 nm; resolution
0.7 nm) of SN 1999ei on Oct. 16.19 using the 2.5-m DuPont telescope
at Las Campanas Observatory.  The spectrum reveals that the
supernova is a type-Ia event, about 1 week past maximum.  The
redshift (based on H-alpha and [N II] emission lines in the host
galaxy) of the supernova is z = 0.031.

                      (C) Copyright 1999 CBAT
1999 October 18                (7283)            Daniel W. E. Green

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