Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 5723: 1993d; 1993H; U Gem

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 5722 SEARCH Read IAUC 5724

View IAUC 5723 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 5723
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)


COMET MUELLER (1993d)
     Jean Mueller, Palomar Mountain Observatory, reports her discovery
of a comet on a 75-min exposure obtained on Mar. 19 by J. D.
Mendenhall and herself with the 1.2-m Oschin Schmidt telescope in the
course of the second Palomar Sky Survey.  The comet had a very obvious
tail to the northwest.  A confirmatory plate was taken on Mar. 24 by
Mueller and C. Brewer through clouds.   Mueller has measured the
following positions:

     1993 UT             R.A. (2000) Decl.       m1
     Mar. 19.35903   13 01 45.39   +64 20 47.6   17
          19.38507   13 01 44.55   +64 20 49.4
          19.41112   13 01 43.92   +64 20 50.5
          24.35938   12 58 12.31   +64 22 47.3


SUPERNOVA 1993H IN ESO 445-G66
     M. Hamuy, Cerro Tololo Interamerican Observatory; and J. Maza,
University of Chile, report that M. Wischnjewsky has discovered a
supernova 1" east and 12" north of the nucleus of the spiral galaxy
ESO 445-G66 (R.A. = 13h49m58s, Decl. = -30d27'.9, equinox 1950.0).  The
supernova, of mpg about 16.5, was found on a 20-min unfiltered IIa-O
plate taken by G. Valladares and R. Antezana with the CTIO Curtis
Schmidt telescope on Mar. 18.20 UT.  Confirmation was made by D.
Geisler from CCD R and I images obtained on Mar. 21.275 with the CTIO
0.9-m telescope.  Spectra obtained by M. M. Phillips with the CTIO 4-m
telescope on Mar. 21.22 and by M. Hamuy with the CTIO 1.5-m telescope
on Mar. 23.13 reveal that the supernova is of type Ia.  The second
spectrum is intermediate in appearance between the maximum-light
spectra of the type Ia supernovae 1992A and 1986G.  The minimum of the
Si II (635.5 nm) line yields an expansion velocity of 10 100 km/s with
respect to the galaxy's rest frame.


U GEMINORUM
     Visual magnitude estimates by P. Schmeer, Bischmisheim, Germany:
Mar. 19.88 UT, 9.7; 20.86, 9.3.

     Corrigendum.  On IAUC 5722, for Kibbutz Sheffagim read Kibbutz
Sheffayim.


1993 March 24                  (5723)              Brian G. Marsden

Read IAUC 5722 SEARCH Read IAUC 5724

View IAUC 5723 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!