[IAUC] IAUC 9055: Sats OF JUPITER; C/2009 A7, C/2009 B8-B11,, C/2009 C3-C4 [25139-2009/08-R1]
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Mie Jul 8 01:06:33 ART 2009
Circular No. 9055
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SATELLITES OF JUPITER
A. A. Christou, Armagh Observatory, reports that his CCD
photometry of Jupiter V (Amalthea), obtained by F. Lewis (Faulkes
Telescope Project, Open University) using the 2-m Faulkes Telescope
South (+ Pan-STARRS z' filter) reveals an eclipse of this satellite
by Jupiter I (Io) on 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 utilizing a generic mutual-
eclipse model (Christou 2005, Icarus 178, 171) 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/.
COMETS C/2009 A7, C/2009 B8-B11, AND C/2009 C3-C4 (SOHO)
Further to IAUC 9042, additional apparent comets have been
found on SOHO website images -- all Kreutz sungrazers except for
C/2009 B10 (Meyer group). C/2009 A7 was stellar in appearance (mag
about 7-7.5) in the C3 images; it was also imaged with the SECCHI
HI-1A camera, which showed it to be small and slightly diffuse at
mag about 11. C/2009 B8 was slightly diffuse (mag about 7).
C/2009 B9 was stellar in appearance (mag about 7.5). C/2009 B10
was stellar in appearance (mag about 7.5) and perhaps slightly
elongated. C/2009 B11 was also stellar in appearance (mag about 7-
7.5). C/2009 C3 was bright (mag about 2-3) with a thin tail in C3
images, while in C2 images it showed a long, thin tail that went
past the field-of-view and showed no appreciable 'head'. C/2009 C4
was slightly elongated, peaking at mag about 7 (and brightening in
the last image).
Comet 2009 UT R.A.(2000)Decl. Inst. F MPEC
C/2009 A7 Jan. 4.513 19 14.0 -24 40 C3* AK 2009-M41
C/2009 B8 20.971 20 28.0 -21 46 C3 BZ 2009-M41
C/2009 B9 29.238 21 01.3 -20 01 C3 ZX 2009-M41
C/2009 B10 29.271 20 51.3 -16 28 C2 ZX 2009-M42
C/2009 B11 30.804 21 09.7 -18 51 C3 TH 2009-M42
C/2009 C3 Feb. 4.279 21 40.6 -18 41 C3/2 RM 2009-M42
C/2009 C4 7.936 21 52.8 -17 05 C3 BZ 2009-M54
(C) Copyright 2009 CBAT
2009 July 6 (9055) Daniel W. E. Green
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