Central Bureau for Astronomical Telegrams

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IAUC 7564: C/2001 A2; 2001J; 2001G

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IAUC number 

                                                  Circular No. 7564
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2001 A2 (LINEAR)
     An apparently asteroidal object discovered by LINEAR on Jan.
15 and posted on the NEO Confirmation Page has been found to have
cometary appearance on CCD images taken by P. Pravec and L.
Sarounova (Ondrejov; 0'.3 coma on Jan. 16.0 UT) and by M. Tichy and
M. Kocer (Klet; diffuse, 10" coma on Jan. 16.9; m_1 = 17.2).  The
object also links with one observed on Jan. 3 and 5.

     2001 UT             R.A. (2000) Decl.        m2
     Jan.  3.31447    8 39 08.53   +14 20 48.8   19.0

The astrometric observations, together with the parabolic orbital
elements given below and an ephemeris, appear on MPEC 2001-B05.

     T = 2001 May  24.654 TT          Peri. = 295.293
                                      Node  = 295.145   2000.0
     q = 0.77977 AU                   Incl. =  36.576


SUPERNOVA 2001J IN UGC 4729
     S. Beckmann and W. D. Li, University of California at Berkeley,
on behalf of LOTOSS (cf. IAUC 7514), report the discovery of an
apparent supernova (mag about 17.5) on unfiltered images taken on
Jan. 15.4 and 16.3 UT with the 0.8-m Katzman Automatic Imaging
Telescope (KAIT).  SN 2001J is located at R.A. = 9h00m43s.23, Decl.
= +17o37'15".6 (equinox 2000.0), which is 19".2 east and 2".4 south
of the nucleus of UGC 4729.  A KAIT image of the same field taken
on 2000 Dec. 27.4 showed nothing at this position (limiting mag
about 19.0).


SUPERNOVA 2001G IN MCG +08-17-43
     T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that spectra of SN
2001G (cf. IAUC 7560), obtained by M. Calkins on Jan. 15.31 UT with
the F. L. Whipple Observatory 1.5-m telescope (+ FAST spectrograph),
show it to be a type-Ia supernova before maximum light.  The
spectrum consists of a blue continuum with well-defined Si II and
Ca II features.  The spectral-feature age of the supernova (Riess
et al. 1997, A.J. 114, 722) is 2 +/- 2 days before maximum light.

                      (C) Copyright 2001 CBAT
2001 January 16                (7564)            Daniel W. E. Green

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