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IAUC 8436: P/2004 TU_12; 2004fu

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                                                  Circular No. 8436
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/2004 TU_12 (SIDING SPRING)
     An apparently asteroidal object discovered on Oct. 10 by the
Siding Spring Survey (announced as 2004 TU_12 on MPEC 2004-T55;
discovery observation below) has been found to show a short
eastward tail.  CCD images taken over 2.5 hr with the 0.36-m
"SoTIE" reflector at Las Campanas by F. Mallia, G. Masi, and R.
Wilcox on Nov. 12.0 UT show a tail about 2' long in p.a. 70 deg
(the "head" appearing like stars in the field (FWHM about 3").
Eighty 30-s CCD images taken on Nov. 12.8 by J. Lacruz (La Canada,
Spain) show a sharp tail 4' long in p.a. 69 deg (and total mag 14.3).

     2004 UT             R.A. (2000) Decl.       Mag.
     Oct. 10.55030   22 52 33.67   -51 01 39.8   14.1

The following orbital elements from MPEC 2004-V56 are from
identified observations spanning 1990-2004 (H_10 = 15.0).

                    Epoch = 2005 Jan. 30.0 TT
     T = 2004 Nov. 10.2817 TT         Peri. = 356.3614
     e = 0.597279                     Node  =  31.2525  2000.0
     q = 1.227632 AU                  Incl. =  27.8448
       a =  3.048339 AU    n = 0.1851864    P =   5.32 years

2004 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase   Mag.
Nov. 11    22 50.63   -11 25.4   0.456   1.228  110.7   49.0   14.2
     21    23 01.38   + 1 29.3   0.495   1.234  108.0   49.6   14.4
Dec.  1    23 15.80   +12 33.8   0.555   1.252  105.2   49.4   14.7
     11    23 33.48   +21 38.5   0.631   1.281  102.7   48.6   15.1
     21    23 54.35   +28 58.6   0.718   1.319  100.5   47.2   15.5
     31     0 18.32   +34 54.0   0.814   1.366   98.5   45.4   15.9


SUPERNOVA 2004fu IN NGC 6949
     M. Modjaz, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm)
of SN 2004fu (cf. IAUC 8428), obtained by M. Westover on Nov. 10.17
UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST
spectrograph), shows it to be a type-Ia supernova, several days
before maximum light.  Adopting the NED recession velocity of 2761
km/s for the host galaxy, the ejecta expansion velocities are 14000
km/s for Si II (rest 635.5 nm) and 22700 km/s for Ca II (rest 395.1
nm).

                      (C) Copyright 2004 CBAT
2004 November 12               (8436)            Daniel W. E. Green

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