Asteroid occultation event on August 09

[PTS]

Here are the details and finder charts for the August asteroid occultation.

See also :
http://forum.hkas.org.hk/viewthread.php ... a=page%3D1

PTS
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IOTA/IOTA-ES occultation update for
(410) Chloris / 2UCAC 21816632 event on 2010 Aug 09, 14:45 UT
Visible from Philippines, China


Summary
-------
On 2010 Aug 09 UT, the 124 km diameter asteroid (410) Chloris will occult a 13.4
mag star in the constellation Ophiuchus for observers along a path across
Philippines, China.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 0.2 mag to 11.7 mag (the magnitude of the asteroid) for at most
19.6 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly
provided by Alice Monet, historical astrometry from the MPC files (via AstDys),
and the following catalogs for the star position: UCAC.

The event at a glimpse
----------------------
* Rank: 93
* date and approx. time of event: 2010 Aug 09, 14:36 - 2010 Aug 09, 14:53 UT
* magnitude of target star: 13.4
* magnitude drop [mag]: 0.2
* estimated maximum duration [s]: 19.6
* Moon: 1 % sunlit, 131?distance
* Sun: 123?distance
* rough path description: Philippines, China

The occultation path
--------------------
* approximate projected width [km]: 238
* 1 sigma uncertainty interval [path widths]: +/- 0.47
* 1 sigma uncertainty interval [seconds]: +/- 8.9
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .061 +/- .058)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .061", .058", 93?)
* approx speed of asteroid's shadow [km/s]: 6.2949
* website for maps:
http://www.asteroidoccultation.com