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IAUC 7817: C/2002 B1; 2002ap; 2002I

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                                                  Circular No. 7817
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/2002 B1 (LINEAR)
     An object reported as asteroidal in appearance by LINEAR, and
posted on the NEO Confirmation Page, has been found to be cometary
on CCD images taken by M. Tichy and J. Ticha at Klet (coma diameter
7"-8", on Jan. 29.8 and Feb. 1.8 UT; coma diameter 9" with m_1 =
17.7-18.0 and a faint tail in p.a. 165 deg on Feb. 4.8) and by A.
Galad and L. Kornos at Modra ('slightly diffuse' on Feb. 1 and 2).

     2002 UT             R.A. (2000) Decl.        m2
     Jan. 26.09423    3 06 22.85   +64 47 16.2   18.2

     Additional astrometry (including LINEAR prediscovery
observations made on 2001 Nov. 8), the following orbital elements,
and an ephemeris appear on MPEC 2002-C20.

                    Epoch = 2002 May   6.0 TT
     T = 2002 Apr. 20.15557 TT        Peri. =  76.25784
     e = 0.7706525                    Node  =  58.16584 2000.0
     q = 2.2692128 AU                 Incl. =  50.99090
       a =  9.8942127 AU   n = 0.03166884   P =  31.122 years


SUPERNOVA 2002ap IN M74
     E. Berger, S. R. Kulkarni, and D. A. Frail, California
Institute of Technology, report that an observation of SN 2002ap
with the Very Large Array at 8.46 GHz on Feb. 1.03 UT reveals a
radio source with a flux density of 375 +/- 30 microJy coincident
with the supernova (IAUC 7816; GCN Circ. No. 1237):  "The radio
emission peaks at approximately 5 GHz and appears to be fading with
flux densities in the 8.46-GHz band of 255 +/- 44 microJy on Feb.
1.93 and 201 +/- 47 microJy on Feb. 2.79.  SN 2002ap is thus > 3
orders of magnitude less luminous in the radio band than SN
1998bw."


SUPERNOVA 2002I IN IC 4229
     T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum (range
370-750 nm) of SN 2002I (cf. IAUC 7799), obtained by M. Calkins on
Jan. 22.53 UT with the F. L. Whipple Observatory 1.5-m telescope (+
FAST spectrograph), shows it to be a type-Ia supernova several
weeks past maximum.

                      (C) Copyright 2002 CBAT
2002 February 4                (7817)            Daniel W. E. Green

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