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IAUC 8230: P/2003 U3; 2003iy, 2003iz; C/2003 T3

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                                                  Circular No. 8230
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 P/2003 U3 (NEAT)
     K. Lawrence, Jet Propulsion Laboratory, reports the discovery
by the NEAT project of a comet (discovery observation below).
Observations by J. Young at Table Mountain on Oct. 23.2 UT show a
3" coma with a short, broad, fan-shaped tail about 8" long spanning
p.a. 255-285 deg.

     2003 UT             R.A. (2000) Decl.       Mag.
     Oct. 22.28573    2 16 17.40   +22 00 06.7   18.9

The available astrometry (including prediscovery LONEOS
observations from Oct. 17), the following preliminary orbital
elements, and an ephemeris appear on MPEC 2003-U54.

     T = 2003 May 1.854 TT            Peri. = 355.717
     e = 0.56512                      Node  = 347.493   2000.0
     q = 2.38435 AU                   Incl. =   6.857
       a =  5.48280 AU     n = 0.076771     P =  12.8 years


SUPERNOVAE 2003iy AND 2003iz
     The discoveries of two apparent supernovae have been reported
from unfiltered CCD images:  2003iy in NGC 6143 by K. Itagaki
(Teppo-cho, Yamagata, Japan, 0.6-m reflector; via S. Nakano, Sumoto,
Japan) and 2003iz in UGC 638 by B. Beutler and W. Li (LOSS/KAIT; cf.
IAUC 8229).

SN       2003 UT        R.A.  (2000.0)  Decl.   Mag.     Offset
2003iy   Oct. 20.39   16 21 43.22  +55 05 05.2  16.8   8" E, 4" S
2003iz   Oct. 21.4     1 02 06.75  +26 56 21.3  17.7  18" E, 46" S

Additional magnitudes by Itagaki for SN 2003iy (which was also
absent on his images of 2003 Oct. 6 and 9):  2002 June 28, [18.5;
2003 July 15, [18.5; Oct. 22.364 UT, 16.9.  Additional KAIT
magnitudes for SN 2003iz:  Oct. 4.4, [19.0; 14.4, 18.3; 22.4, 17.7.
(The offset for SN 2003iz above is corrected from that on CBET 50.)


COMET C/2003 T3 (TABUR)
     Total-visual-magnitude and coma-diameter estimates:  Oct.
16.49 UT, 11.9, 0'.9 (A. Pearce, Nedlands, W. Australia, 0.41-m
reflector); 16.94, 12.0, 0'.5 (A. Amorim, Florianopolis, Brazil,
0.14-m reflector).

                      (C) Copyright 2003 CBAT
2003 October 23                (8230)            Daniel W. E. Green

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