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IAUC 7083: 1999A; 1998co; C/1995 O1

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                                                  Circular No. 7083
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)


SUPERNOVA 1999A IN NGC 5874
     M. Modjaz, E. Halderson, T. Shefler, J. Y. King, M. Papenkova,
W. Li, R. R. Treffers, and A. V. Filippenko, University of
California at Berkeley, report their discovery of an apparent
supernova during the course of the Lick Observatory Supernova
Search (cf. IAUC 6627) with the 0.8-m Katzman Automatic Imaging
Telescope (KAIT).  SN 1999A was discovered and confirmed on
unfiltered observations taken on Jan. 10.6 (mag about 18.3) and
11.6 UT (mag about 18.2; limiting mag 19.5-20.0).  The new object
is located at R.A. = 15h07m55s.28, Decl. = +54o45'40".0 (equinox
2000.0), which is about 29".9 east and 30".1 north of the nucleus
of NGC 5874.  There is a star of mag 16.2 very close to SN 1999A
with position end figures 55s.10, 45".2.  A KAIT image of the same
field on 1998 July 23.3 (limiting mag about 18.5) shows nothing at
the position of SN 1999A, nor do the first and second Digital Sky
Survey images of the field (limiting mag > 20).


SUPERNOVA 1998co IN NGC 7131
     E. Prosperi, Larciano, Italy, provides the following position
for SN 1998co from a Mount Hopkins 1.2-m telescope image obtained
on 1998 June 22 (see
http://cfa-www.harvard.edu/cfa/oir/Research/supernova/RecentSN.html):
R.A. = 21h47m36s.45, Decl. = -13o10'42".3 (equinox 2000.0).


COMET C/1995 O1 (HALE-BOPP)
     Ephemeris extension to IAUC 7047 (orbital elements MPC 32410):

1999 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Jan.  2     5 48.1    -73 47.0   7.394   7.335   82.7    7.6   11.0
     12     5 29.7    -73 26.9   7.479   7.418   82.7    7.6   11.1
     22     5 14.2    -72 50.1   7.563   7.501   82.6    7.5   11.1
Feb.  1     5 02.1    -72 00.6   7.647   7.583   82.6    7.4   11.2
     11     4 53.7    -71 02.5   7.729   7.664   82.6    7.3   11.3
     21     4 48.59   -69 59.6   7.810   7.746   82.7    7.3   11.4
Mar.  3     4 46.46   -68 55.1   7.889   7.827   82.8    7.2   11.4
     13     4 46.83   -67 51.6   7.967   7.907   83.0    7.2   11.5
     23     4 49.28   -66 51.2   8.044   7.987   83.2    7.1   11.6
Apr.  2     4 53.44   -65 55.6   8.119   8.067   83.5    7.1   11.6

     Visual m_1 estimates: Jan. 1.79 UT, 11.2 (A. Pearce, Nedlands,
W. Australia, 0.41-m reflector); 5.41, 10.2 (S. T. Rae, Te Awamutu,
New Zealand, 0.11-m reflector); 7.42, 10.4 (Rae); 10.65, 11.0
(Pearce).

                      (C) Copyright 1999 CBAT
1999 January 12                (7083)            Daniel W. E. Green

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