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IAUC 8305: P/2004 DO_29; 2004au

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                                                  Circular No. 8305
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 found by both the Spacewatch
and LINEAR projects on CCD images taken on Feb. 17 (discovery
observations below from MPEC 2004-D45 and MPS 10267) has been found
to have a 5" centrally condensed coma (of mag R = 18.7) and a 15"
tail in p.a. 220-270 deg on CCD images taken on Mar. 16.3-16.6 UT
by S. S. Sheppard, Y. R. Fernandez, and D. Jewitt with the
University of Hawaii 2.2-m reflector.

     2004 UT             R.A. (2000) Decl.       Mag.   Observer
     Feb. 17.21711   10 47 22.60   +10 49 35.4   19.8   Spacewatch
          17.27872   10 47 20.87   +10 49 56.9   19.4   LINEAR

Additional astrometry, the following orbital elements, and an
ephemeris appear on MPEC 2004-F09.

     T = 2004 Oct.  7.5747 TT         Peri. =  41.3922
     e = 0.451320                     Node  = 147.8274  2000.0
     q = 4.091407 AU                  Incl. =  14.4752
       a =  7.456814 AU    n = 0.0484032    P =  20.362 years

SUPERNOVA 2004au IN MCG +04-42-2
     Further to IAUC 8302, W. Li et al. report the LOSS discovery
of a supernova on unfiltered KAIT images taken on Mar. 9.55 (mag
18.8) and 11.55 UT (mag 18.7).  SN 2004au is located at R.A. =
17h42m02s.98, Decl. = +25o37'11".9 (equinox 2000.0), which is 4".2
east and 0".6 south of the center of MCG +04-42-2.  Nothing was
visible at this location on a KAIT image taken on 2003 Sept. 13.21
(limiting mag 19.5).
     A. V. Filippenko, R. J. Foley, and R. Chornock, University of
California, Berkeley, report that inspection of CCD spectra
obtained on Mar. 16 UT with the Keck I 10-m telescope (+ LRIS;
range 310-920 nm) shows that the object is of type II, roughly 1
month past maximum brightness, with well-developed P-Cyg profiles.
The recession velocity of the host galaxy, measured from H_alpha in
superposed H II regions, is 7300 km/s.  The ejecta expansion
velocity, derived from the minimum of the H_alpha absorption line,
is about 6600 km/s.

                      (C) Copyright 2004 CBAT
2004 March 16                  (8305)            Daniel W. E. Green

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