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THE ASTRONOMER Electronic Circular No 2650      2010 Jun 07 16.10UT
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 C/2009 R1 (McNAUGHT)
Visual total-magnitude and coma-diameter estimates from IAUC 9150: May 
14.79 UT, 8.6, 4' (D. A. J. Seargent, Cowra, NSW, Australia, 25x100 
binoculars); 17.14, 7.8, 8' (J. J. Gonzalez, Leon, Spain, 10x50 
binoculars); 25.46, 7.3, 5' (C. W. Hergenrother, Tucson, AZ, U.S.A., 
10x50 binoculars); June 1.07, 6.5, 5' (S. Baroni, Milan, Italy, 20x80 
binoculars); 4.00, 6.3, 2' (U. Pilz, Leipzig, Germany, 20x80 
binoculars).

A long series of images showing multiple tail streamers has also been 
received from Martin Mobberley who used the GRAS facility.

SUPERNOVA 2010bt IN NCG 7130
Discovery by Berto Monard, South Africa of a possible supernova (CBET 
2250):
SN      2010 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2010bt  Apr 17.10   21 48 20.22  -34 57 16.5  15.9    9  "W, 14  "S

SUPERNOVA 2010bu IN ANONYMOUS GALAXY
Discovery by CRTS of a possible supernova (CBET 2254):
SN      2010 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2010bu  Apr  9.37   15 42 58.38  +02 16 52.6  16.9    2.2"W,  3.1"S
J. M. Silverman, et. al., University of California, Berkeley, report 
that a CCD spectrum of Apr. 15 UT with the 3-m Shane reflector (+ Kast) 
at Lick Observatory, shows it to be a normal type-Ia supernova then 
within a few days of maximum brightness.

SUPERNOVA 2010bv IN PGC 68345
Discovery by Stuart Parker, New Zealand of a possible supernova (CBET 
2255):
SN      2010 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2010bv  Apr 19.755  22 14 01.89  -26 55 44.6  15.4R  15  "W, 31  "N

SUPERNOVAE 2010bw-cj
The above designations have been assigned on CBET 2258 to numerous 
supernovae found during the Catalina Sky Survey during March and April 
with magnitudes 17.5 or fainter.

SUPERNOVA 2010ck IN MCG +06-31-61
Discovery by Ernesto Guido and Jack Newton of a possible supernova (CBET 
2263):
SN      2010 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2010ck  Apr 25.26   14 04 11.29  +33 18 22.2  16.1    5.4"E,  6.2"S

Guy M Hurst