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IAUC 8621: P/2005 T5; 2005hc, 2005hd, 2005he

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                                                  Circular No. 8621
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/2005 T5 (BROUGHTON)
     John Broughton, Reedy Creek, Qld., Australia, reports his
discovery of a comet on CCD images taken with a 0.51-m f/2.7
reflector (discovery observation below).  Other observers have
confirmed the object's cometary appearance from their own CCD
images, including J. Young (Table Mountain, 0.6-m reflector, co-
added exposures taken on Oct. 24.2 UT; prominent, round 8" coma
with a 16" tail spanning p.a. 20-30 deg), R. H. McNaught (Siding
Spring, 1.0-m reflector, 60-s exposures taken on Oct. 24.45; very
strongly condensed condensation of size 2".5 FWHM with a faint 12"
tail in p.a. 40 deg), and J. E. McGaha (Tucson, 0.62-m reflector,
five 180-s co-added frames taken on Oct. 25.2; round, bright inner
coma of diameter about 7" and a very faint outer coma extending to
about 20", no tail).

     2005 UT             R.A. (2000) Decl.       Mag.
     Oct.  9.57058    0 06 38.05   -27 22 54.2   18.5

The available astrometry (prediscovery observations back to Aug.
26), the following orbital elements, and an ephemeris appear on
MPEC 2005-U53.

     T = 2005 Nov.  3.3917 TT         Peri. = 304.4863
     e = 0.552357                     Node  =  57.0701  2000.0
     q = 3.247088 AU                  Incl. =  21.3730
       a =  7.253744 AU    n = 0.0504499    P =  19.536 years


SUPERNOVAE 2005hc, 2005hd, 2005he
     Three supernovae have been reported:  2005hc in MCG +00-6-3 by
J. Frieman (Fermilab and University of Chicago), on behalf of the
Sloan Digitial Sky Survey II collaboration; 2005hd by the "Nearby
Supernova Factory" collaboration; and 2005he in MCG +06-49-68 by D.
R. Madison and W. Li on unfiltered LOSS/KAIT images (cf. IAUC 8616).

SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2005hc  Oct. 12      1 56 47.94  - 0 12 49.2  18.5  8".4 W, 3".9 S
2005hd  Oct. 21.5    4 16 12.37  -13 13 11.6  17.8     --
2005he  Oct. 24.23  22 39 45.44  +34 22 43.0  18.6  1".3 W, 5".5 S

SN 2005hc is a type-Ia supernova (details on CBETs 259 and 260).
SN 2005hd is a type-II supernova (details on CBET 263).  Additional
KAIT magnitudes for 2005he:  Sept. 29.24 UT, [19.5; Oct. 16.22,
[18.5; 25.22, 18.7.

                      (C) Copyright 2005 CBAT
2005 October 25                (8621)            Daniel W. E. Green

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