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IAUC 8606: C/2005 S2; 2005ee

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                                                  Circular No. 8606
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/2005 S2 (SKIFF)
     B. Skiff, Lowell Observatory, reports his discovery of a comet
(discovery observation tabulated below) on CCD images taken with
the LONEOS 0.59-m Schmidt telescope, the object showing a
moderately condensed 6" coma and a fan-shaped tail extending
perhaps 15" toward the southwest (in the direction of motion).  A
5-min exposure taken by Skiff with the Perkins 1.8-m telescope (+
PRISM camera + 'VR' filter) shows the coma diameter as about 5"
and the tail extending at least 36" in p.a. about 240 deg.
Following posting on the 'NEO Confirmation Page', J. Young reports
that six stacked CCD images taken on Sept. 30.23-30.28 UT with the
0.6-m Cassegrain reflector at Table Mountain show the comet to have
a 4" coma with a 12" tail in p.a. 260 deg, and E. J. Christensen
reports that four 45-s co-added frames taken with the 1.5-m
Catalina reflector on Sept. 30.3 show an 8" coma and a 20" tail in
p.a. 230-240 deg.

     2005 UT             R.A. (2000) Decl.       Mag.
     Sept.29.27649    0 55 25.73   + 3 48 39.9   19.1

The available astrometry (including Sept. 25 prediscovery
Spacewatch observations), the following very indeterminate
parabolic orbital elements, and an ephemeris appear on MPEC
2005-S78.

     T = 2010 Feb. 12.081 TT          Peri. = 306.165
                                      Node  = 201.227   2000.0
     q = 3.29967 AU                   Incl. = 166.711


SUPERNOVA 2005ee IN PGC 73054
     M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrogram (range 340-740
nm) of SN 2005ee (cf. IAUC 8603), obtained by N. Martimbeau on Sept.
25.32 UT with the F. L. Whipple Observatory 1.5-m telescope (+
FAST), shows it to be a type-II supernova.  The spectrum consists
of a flat continuum, a P-Cyg profile of H_alpha, and absorption
troughs of H_beta and other lines.  Adopting the recession velocity
of 9730 km/s for the host galaxy, as measured from H_alpha emission
of an H II region in the host galaxy, the supernova expansion
velocity derived from the minimum of the H_beta line is about 11000
km/s.

                      (C) Copyright 2005 CBAT
2005 September 30              (8606)            Daniel W. E. Green

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