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IAUC 8350: C/2004 K3; 2004bz, 2004ca, 2004cb, 2004cc

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                                                  Circular No. 8350
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/2004 K3 (LINEAR)
     An apparently asteroidal object reported by LINEAR (discovery
observation below), and posted on the NEO Confirmation Page, has
been found to have cometary appearance on CCD images taken by P.
Birtwhistle (Great Shefford, U.K.; coma diameter 12" with a hint of
a 9"-wide extension emanating from a 3" central condensation for
approximately 20" in p.a. 90 deg) and by P. Holvercem and M.
Schwartz (Tenagra Observatories, Nogales, AZ; 0.81-m f/7 reflector;
5" coma).

     2004 UT             R.A. (2000) Decl.       Mag.
     May  29.34561   20 39 47.43   +38 05 13.0   19.3

The early astrometry, preliminary parabolic orbital elements (T =
2004 June 30.0 TT, q = 1.106 AU, i = 112.0 deg, Peri. = 60.2 deg,
Node = 275.6 deg, equinox 2000.0), and an ephemeris appear on MPEC
2004-L04.


SUPERNOVAE 2004bz, 2004ca, 2004cb, 2004cc
     Several apparent supernovae have been discovered on unfiltered
CCD images -- 2004cb by L. A. G. Monard, Pretoria, South Africa
(0.30-m reflector) and the rest by the LOSS team (via W. Li; KAIT
detector).

SN       2004 UT        R.A.  (2000.0)  Decl.   Mag.     Offset
2004bz   June  2.46   22 15 01.05  +15 24 16.6  18.3   32".2 W, 12".3 N
2004ca   June  2.47   21 43 32.84  +43 41 33.0  18.2   24".8 W, 6".2 S
2004cb   May  12.80   13 43 48.52  -29 44 59.2  15.8   10" W, 21" S
2004cc   June 10.26   12 36 34.40  +11 14 32.8  17.5   1".9 E, 12".8 N

Additional magnitudes by the respective discoverers:  SN 2004bz in
MCG +02-56-25, 2003 Nov. 29.17 UT, [19.5; 2004 June 3.48, 18.2.  SN
2004ca in UGC 11799, May 25.45, [19.0; June 3.48, 18.0.  SN 2004cb
in an edge-on galaxy, Apr. 16.814, [18.5; June 7.758, 15.8 +/- 0.3.
SN 2004cc in NGC 4568, May 23.26, [19.0; June 11.23, 17.1.  SN
2004cb is also absent on the red Digitized Sky Survey field
(limiting mag 20).
     Further to IAUC 8338, T. Matheson et al. report that a
spectrum (range 340-730 nm) of SN 2004ca, obtained by M. Calkins on
June 10.46 UT, shows it to be a type-Ia supernova near maximum
spectral-feature age 2 +/- 2 days before maximum light).  Adopting
the NED recession velocity of 5338 km/s for the host galaxy, the
supernova expansion velocity is 12800 km/s for Si II (rest 635.5
nm) and 20400 km/s for Ca II (rest 395.1 nm).

                      (C) Copyright 2004 CBAT
2004 June 11                   (8350)            Daniel W. E. Green

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