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THE ASTRONOMER Electronic Circular No 2409      2008 Jan 05 14.34UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK      Backup: gmh@wdcc1.bnsc.rl.ac.uk
WORLD WIDE WEB                         http://www.theastronomer.org
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COMET 8P/TUTTLE
D. Schleicher, Lowell Observatory et. al., report on IAUC 8906 
narrowband imaging of this comet on Dec. 15 and 16 using the Hall 1.1-m 
telescope at Lowell Observatory. With over 8 hr of imaging per night, 
along with 4 hr on Dec. 14, they find a nucleus rotation period of about 
5.71 hr (estimated uncertainty 0.04 hr) based on 14 pairs of matching CN 
images from various rotational cycles.

SUPERNOVA 2007su IN ANONYMOUS GALAXY
Discovery by ROTSE collaboration of a possible supernova (CBET 1178:
SN      2007 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2007su  Dec 19.10   22 19 08.88  +13 10 40.3  17.1   0.4"E, 0.2"S
A spectrogram of Dec 23.05 by M. Sheltrone shows it to be of type-Ia.

VARIABLE 2007sv IN UGC 5979
Discovery by G. Duszanowicz, Sweden, of a possible supernova (CBET 1182:
SN      2007 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2007sv  Dec 20.91   10 52 40.05  +67 59 14.2  17.4   6.9"W, 6.7"S
A. Harutyunyan et. al., Queen's University; and S. Taubenberger, 
Max-Planck Institute for Astrophysics, report that inspection of a 
low-signal-to-noise CCD spectrogram obtained on Dec. 29.96 UT with the 
Asiago 1.82-m telescope at Mt. Ekar (+ AFOSC) reveals that the spectrum 
of 2007sv suggests that this object might not be a real supernova but a 
super-outburst of a luminous blue variable similar to 1997bs.

SUPERNOVA 2007sw IN UGC 7228
Discovery by Quimby et. al., of a possible supernova (CBET 1185:
SN      2007 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2007sw  Dec 29.49   12 13 36.88  +46 29 36.1  16.0   0.7"E, 2.2"S
A spectrum obtained on Dec. 30.39 with the 9.2-m Hobby-Eberly Telescope 
by S. Odewahn and E. Terrazas, shows it to be a type-Ia supernova.

SUPERNOVAE 2007sx-2007uw
The ESSENCE project have reported on CBET 1186 the discovery of 52
supernovae on multiple R- and I-band images taken with the Blanco 4-m 
telescope during 2007 Oct. 2-Dec. 21. All of the objects were
discovered at R magnitudes between 22.5 and 23.3.

Guy M Hurst