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IAUC 8490: 2005am; 2005ah; C/2005 D1; C/1995 O1

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IAUC number

                                                  Circular No. 8490
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)

SUPERNOVA 2005am IN NGC 2811
     R. Martin, Perth Observatory, reports the discovery of an
apparent supernova (mag 17.5) in the course of the Perth Automated
Supernova Search on CCD images taken on Feb. 22.733 and 24.579 UT.
The new object is located at R.A. = 9h16m12s.47, Decl.
= -16o18'16".0 (equinox 2000.0), which is 17".6 east and 31" north
of the center of NGC 2811.  Nothing was visible at this location
on an image taken on Feb. 18.622 (limiting mag 18.5).  Martin adds
that the supernova had brightened between Feb. 22 and 24.  H.
Yamaoka, Kyushu University, writes that K. Itagaki (Teppo-cho,
Yamagata, Japan) found SN 2005am at (red) mag 14.0 on a confirming
unfiltered CCD image taken on Mar. 2.574 with a 0.60-m reflector,
providing position end figures 13s.07, 16".4 (adding that there is
a foreground star about 7" southwest of the new object at position
end figures 12s.88, 22".1).

     M. Salvo, J. Rich, and B. Schmidt, Australian National
University (ANU), report that a low-S/N spectrum (range 360-750
nm) of SN 2005ah (cf. IAUC 8486), obtained with the ANU 2.3-m
telescope (+ Double-Beam Spectrograph) at Siding Spring
Observatory on Feb. 18.48 UT, is consistent with that of a
type-Ia supernova a few weeks after maximum light.

COMET C/2005 D1 (SOHO)
     Continuation to IAUC 8488 (not a known group member):

 Comet       2005 UT      R.A.(2000)Decl.   Inst.  F    MPEC
 C/2005 D1   Feb. 23.205  22 22.2  -11 52   C2     HS   2005-E01

     S. Nakano, Sumoto, Japan, has acquired astrometry and
photometry of this comet from unfiltered CCD images obtained by M.
Tsumura (Wakayama, Japan) with a 0.20-m reflector and a 0.11-m
refractor during visits to Waddi Farm in Western Australia,
yielding the following total magnitudes for the comet (which showed
a very diffuse coma of diameter about 6"):  2004 Mar. 21.63 UT,
17.8-17.9; 25.56, 17.8-18.0; 2005 Feb. 8.6, 18.3-18.4.  There have
been very few observations of this comet, now at r = 21 AU, in the
last two years (see also IAUC 8479).

                      (C) Copyright 2005 CBAT
2005 March 2                   (8490)            Daniel W. E. Green

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