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THE ASTRONOMER Electronic Circular No 2564      2009 Jly 11 18.24UT
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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SATELLITES OF JUPITER
A. A. Christou, Armagh Observatory, reports on IAUC 9055 that his CCD 
photometry of Jupiter V (Amalthea), obtained by F. Lewis using the 2-m 
Faulkes Telescope South (+ Pan-STARRS z' filter) reveals an eclipse of 
this satellite by Jupiter I (Io) on 2009 June 23 UT. Twenty-five 5-sec 
exposures were acquired between June 23.64799 and 23.66425. Amalthea was 
visible in all these frames with the exception of those starting at June 
23.65317 and 23.65379 UT, consistent with a totality between June 
23.65292 and 23.65401 predicted by utilising a generic mutual- eclipse 
model in combination with the SPICE ephemeris kernel JUP230 for the 
Galilean satellites and Amalthea.  Observations at high cadence (<< 60 
s) of further eclipses of Amalthea by Io are encouraged during the 
current Jovian equinox season.  Predictions for July and August 2009 are 
given at website URL http://www.arm.ac.uk/~aac/amalthea/.

SUPERNOVA 2009fi in PGC 50294
The discovery announcement of this object found by Tom Boles appeared on 
TA E-Circular 2556.
P. Challis, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf 
of the CfA Supernova Group, reports on CBET 1826 that a spectrum (range 
360-750 nm) obtained on June 1 UT by W. Peters with the F. L. Whipple 
Observatory 1.5-m telescope (+ FAST), shows it to be a type-IIb 
supernova.
Cross-correlation with a library of supernova spectra using the SNID 
code indicates that the spectrum of 2009fi best resembles the type-IIb 
supernova 1997dd around maximum light; the redshift, as measured from 
emission lines in the host galaxy (PGC 50294), is 0.015.

SUPERNOVAE 2009fm, 2009fn, 2009fo, 2009fp, 2009fq
CRTs discovery of supernovae magnitude 18.4-19.4 April 24-May 18 have 
had the above names assigned according to CBET 1825.

SUPERNOVA 2009fr IN NGC 597
Discovery by the CHASE Project of a possible supernova (CBET 1827):
SN      2009 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2009fr  Jun  1.38   01 32 15.05  -33 29 49.6  16.1     2.9"E, 0.5"N
Nothing is visible at this position on archival images taken on 2008 
Dec. 13.19 (limiting mag 19.0) and 2009 Jan. 3.11 (limiting mag 18.5).

Guy M Hurst