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BAA electronic bulletin No. 00446 http://www.britastro.org/
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RARE DAYLIGHT OCCULTATION OF ANTARES, 2009 OCTOBER 21
On Wednesday October 21st, the thin crescent moon will occult the
second brightest star it can occult, magnitude 1.1 Antares (alpha
Scorpii), in daylight. Specimen disappearance and reappearance
times will be as follows:-
Disappearance Reappearance
UT h m h m
Greenwich 14 55.1 16 09.9
Birmingham 14 51.9 16 06.9
Edinburgh 14 48.9 16 02.7
Add 1 hour to the above times for the time in BST. Approximate
times for other locations can be calculated from the simple formulae
in the 2009 BAA Handbook, p.26.
The moon will be due south at around 10º elevation at disappearance
and slightly lower at reappearance. The cusp angles will be around
79S for the disappearance against the dark limb, and -62S for the
reappearance from the bright limb.
Owing to the low elevation of the moon, these won't be easy to see
without a small telescope, but worth a try if you can. Use the
telescope to find the moon then concentrate on the moon's limb to
search for the star. Even a 1.1 magnitude star may be difficult to
find in daylight, only 40º from the sun.
The undersigned would be interested to receive a copy of any video
recordings of the events.
Unfortunately the weather forecast....
Good luck,
Andrew Elliott
Occultation Coordinator, Lunar Section
Email: ae[at]f2s[dot]com
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BAA electronic bulletins service. E-mail: circadmin@britastro.org
Bulletin transmitted on Tue Oct 20 12:37:39 BST 2009
(c) 2009 British Astronomical Association http://www.britastro.org/
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Good Clear Skies
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Astrocomet
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Colin James Watling
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Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)
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