Asteroid occultation on October 27

[PTS]

Hi,
This will be an early event, at 7 pm.
I've prepared finder charts for this event.

See also post from WC Yue:
http://forum.hkas.org.hk/redirec ... o=lastpost#lastpost


PTS
===================================
IOTA/IOTA-ES occultation update for
(319) Leona / TYC 0045-01477-1 event on 2010 Oct 27, 10:56 UT
Visible from Japan, Taiwan


Summary
-------
On 2010 Oct 27 UT, the 81 km diameter asteroid (319) Leona will occult a 11.5
mag star in the constellation Cetus for observers along a path across Japan,
Taiwan.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 2.1 mag to 13.4 mag (the magnitude of the asteroid) for at most 7.6
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: 89
* date and approx. time of event: 2010 Oct 27, 10:51 - 2010 Oct 27, 11:02 UT
* magnitude of target star: 11.5
* magnitude drop [mag]: 2.1
* estimated maximum duration [s]: 7.6
* Moon: 81 % sunlit, 51?distance
* Sun: 172?distance
* rough path description: Japan, Taiwan

The occultation path
--------------------
* approximate projected width [km]: 151
* 1 sigma uncertainty interval [path widths]: +/- 0.54
* 1 sigma uncertainty interval [seconds]: +/- 4.5
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .033)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .042", .033", 85?)
* approx speed of asteroid's shadow [km/s]: 10.7079
* website for maps: