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THE ASTRONOMER Electronic Circular No 2171      2005 Nov 21 20.48UT
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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SUPERNOVAE 2005io IN UGC 3361
Tom Boles, Coddenham, England, e-mailed us on Nov 4 to report his 
discovery of an apparent supernova (mag 18.6) on an unfiltered CCD image 
taken on Nov 04.007 with a 0.35-m reflector during the course of the UK 
Nova/Supernova Patrol.

The new object is located at:
RA 05h 50m 24.62s DEC+49 43'06.4" (2000) which is approximately 6.3" 
west and 18.5" north of the centre of UGC 3361. The suspect is not 
present on Tom's images of 2005 Mar 14 and Oct 10 (limiting mag 19.5) 
and it is not present on DSS II red (1989.924 limiting mag 21.0), nor 
blue plates (1992.900 limiting mag 21.5)

The object was also independently found by the LOSS team who reported 
end figures of RA 24.64s DEC 06.5" and offsets 6.1"W and 17.6"N.

A. V. Fillippenko et. al., University of California, Berkeley, report 
that CCD spectra of 2005 Nov 5UT with the Keck I 10-m telescope shows it 
to be of type II, detected shortly after the explosion.

The Central Bureau have designated the object as supernova 2005io and 
its discovery has been announced on IAUC 8628.

Congratulations to Tom on the discovery of his 92nd supernova.

Guy M Hurst