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IAUC 8608: C/2005 S3; 2005eq, 2005er,, 2005es

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                                                  Circular No. 8608
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 S3 (READ)
     Michael T. Read reports his discovery of a comet (tabulated
below) on CCD images taken with the 0.9-m f/3 Spacewatch reflector,
the object being diffuse with a long tail toward the southwest.
Several other observers have noted the object's cometary appearance
on their CCD images, including J. Lacruz (La Canada, Spain, 0.30-m
reflector, Oct. 1.0 UT; 22" tail in p.a. 250 deg), P. Birtwhistle
(Great Shefford, U.K., 0.40-m reflector, Oct. 1.11-1.16; very
concentrated nuclear condensation 4" in dia, with a faint coma of
diameter 8" and a straight, thin tail 48" long in p.a. 252 deg),
E. J. Christensen (Mt. Lemmon, 1.5-m reflector, four 30-s co-added
exposures, Oct. 1.4; well-condensed 5" coma of mag 18.5 with a 25"
tail in p.a. 240 deg-250 deg), J. E. McGaha (Tucson, 0.62-m
reflector, Oct. 1.4; 4" x 6" coma elongated with narrow, curved 20"
tail in p.a. 245 deg), and J. Young (Table Mountain, 0.6-m
reflector, Oct. 1.4; bright diffuse coma of diameter 6" and 20"
fan-shaped tail spanning p.a. 245 deg-265 deg).

     2005 UT             R.A. (2000) Decl.       Mag.
     Sept.30.41409    2 27 29.77   +19 18 27.3   19.2

The available astrometry and the following preliminary parabolic
orbital elements appear on MPEC 2005-T11; the comet is likely of
short period.

     T = 2005 May  16.916 TT          Peri. =  55.964
                                      Node  = 288.535   2000.0
     q = 2.42927 AU                   Incl. =   3.139


SUPERNOVAE 2005eq, 2005er, AND 2005es
     Further to IAUC 8605, N. Ponticello, E. Lee, and W. Li report
the LOSS discovery of three apparent supernovae on unfiltered KAIT
images:

SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2005eq  Sep. 30.40   3 08 49.31  - 7 01 59.7  17.4   15".9 E, 26".3 N
2005er  Sep. 29.22  22 50 00.84  +11 37 05.7  18.7   91".1 E, 34" N
2005es  Sep. 30.25  23 25 47.62  + 8 02 17.3  18.4   2".6 W, 8".3 S

Additional magnitudes:  SN 2005eq in MCG -01-9-6, Sept. 15.39 UT,
[19.0; Oct. 1.39, 17.2.  SN 2005er in NGC 7385, Sept. 8.21, [19.5;
13.23, [19.0; 24.22, [18.0; Oct. 1.23, 18.4.  SN 2005es in MCG
+01-59-79, Sept. 11.23, [19.5; 21.24, [18.0; Oct. 1.26, 18.7.

                      (C) Copyright 2005 CBAT
2005 October 1                 (8608)            Daniel W. E. Green

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