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THE ASTRONOMER Electronic Circular No 2346      2007 Jun 14 15.19UT
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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EDITOR'S ABSENCE
The editor will be away and not contactable between June 15 and June 23. 
During that period please refer any urgent queries eg potential 
discoveries to Nick James whose contact details appear on the first page 
of each issue of the magazine.

SUPERNOVA 2007co IN MCG +05-43-16
Further to the note on TA E-Circular 2345 reporting that both supernovae 
2007ck and 2007co have both appeared in MCG +05-43-16 recently, Tom 
Boles relays that he has checked his images.

Stacked confirmation images of his discovery of supernova 2007ck (each 
of 60 second integration time) centred on May 19.973UT do not show 
supernova 2007co to a limit of magnitude 21.2V.

S. Blondin et. al., Harvard-Smithsonian Center for Astrophysics, report 
on CBET 978 that a spectrum (range 350-740 nm) of 2007co, obtained on 
2007 June 8.35 UT by M. Calkins with the F. L. Whipple Observatory 1.5-m 
telescope (+ FAST), shows it to be a type-Ia supernova around one week 
before maximum light.

COMET 133P/ELST-PIZARRO
D. Jewitt et. al., University of Hawaii, report on IAUC 8847 that comet 
133P/Elst-Pizarro = minor planet (7968) Elst- Pizarro has become active 
after a long period of quiescence.

Optical observations with the University of Hawaii 2.2-m telescope on 
June 11 UT show a straight tail at least 20" long in p.a. 256 deg. 
Activity in 133P was last observed in 2002 December.  This object seems 
to be an ice-bearing minor planet or "main-belt comet".

COMET 8P/TUTTLE
C. W. Hergenrother reports on IAUC 8848 his recovery of this comet as a 
stellar object of mag 20 in co-added CCD exposures taken on Apr. 22.5 
and 26.5 UT with the Catalina 1.54-m reflector.

Guy M Hurst