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IAUC 7890: P/2002 EJ_57; 2002cr; C/2002 E2

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IAUC number

                                                  Circular No. 7890
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     An apparently asteroidal object discovered by LINEAR was given
the designation 2002 EJ_57 (observations on MPS 55777-55778).
Additional observations of the object were located during routine
processing at the Minor Planet Center, and these indicated that the
orbit was unusual.  The object was then placed on the NEO
Confirmation Page, resulting in CCD observations by J. Ticha and M.
Tichy at Klet (diffuse with coma diameter about 10" on May 1.8 UT)
and by R. H. McNaught at Siding Spring (circular coma with diameter
about 7" on May 2.5) showing cometary activity.

     2002 UT             R.A. (2000) Decl.        m2
     Mar. 13.20032   10 24 33.18   + 8 23 58.4   18.5

The available astrometry appears on MPEC 2002-J06, together with
the following orbit that shows this to be a short-period comet:

     T = 2001 Dec. 17.0076 TT         Peri. = 166.2200
     e = 0.595362                     Node  = 330.4054  2000.0
     q = 2.630672 AU                  Incl. =   4.9792
       a =  6.501291 AU    n = 0.0594572    P =  16.6 years

SUPERNOVA 2002cr IN NGC 5468
     S. Nakano, Sumoto, Japan, reports the discovery by Reiki
Kushida (Yatsugatake South Base Observatory, 0.40-m Schmidt-
Cassegrain f/5.7 reflector) of an apparent supernova on unfiltered
CCD images taken on May 1.701 (at mag 16.5) and 2.467 UT (mag
16.2).  SN 2002cr is located at R.A. = 14h06m37s.59, Decl. =
-5 26'21".9 (equinox 2000.0), which is 41" east and 50" north of
the center of NGC 5468, in the faint northeast arm of the galaxy.
Searches of images taken by Kushida during 1996-1997 (limiting mag
18.5) and other photographic atlases show nothing in this position.

     Visual m_1 estimates:  Mar. 26.86 UT, 11.1 (A. Pearce,
Nedlands, W. Australia, 0.41-m reflector); Apr. 5.12, 10.5 (W.
Hasubick, Buchloe, Germany, 25x100 binoculars); 10.08, 10.7 (R. J.
Bouma, Groningen, The Netherlands, 0.25-m reflector); 13.06, 10.6
(A. Baransky, Kiev, Ukraine, 0.36-m reflector); 21.76, 11.0 (Y.
Nagai, Yamanashi, Japan, 0.32-m reflector); 30.91, 11.1 (K.
Hornoch, Lelekovice, Czech Republic, 0.35-m reflector).

                      (C) Copyright 2002 CBAT
2002 May 2                     (7890)            Daniel W. E. Green

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