Asteroid occultation on Jan09, 2009

PTS

Hi,
This event will occur in the early hours (01:00 HKT) on Jan. 09, 1009.
The finder charts are from the Digital Sky Survey, and are 15 x 15 arcmin, and from The Sky6.

More details for HK observers can be found here :

http://occultation.freebbs.hk/thread-5376-1-1.html

Enjoy!


PTS
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IOTA/IOTA-ES occultation update for
          (402) Chloe / TYC 0724-01025-1 event on 2009 Jan 08, 17:00 UT
                       Visible from China, Russia, Europe


Summary
-------
On 2009 Jan 08 UT, the 54 km diameter asteroid (402) Chloe will occult a 11.5
mag star in the constellation Orion for observers along a path across China,
Russia, Europe.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 1.2 mag to 12.3 mag (the magnitude of the asteroid) for at most 5.3
seconds.

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

The event at a glimpse
----------------------
    * Rank: 90
    * date and approx. time of event: 2009 Jan 08, 16:50  - 2009 Jan 08, 17:09  UT
    * magnitude of target star: 11.5
    * magnitude drop [mag]: 1.2
    * estimated maximum duration : 5.3
    * Moon: 91 % sunlit, 21° distance
    * Sun: 158° distance
    * rough path description: China, Russia, Europe

The occultation path
--------------------
    * approximate projected width [km]: 58
    * 1 sigma uncertainty interval [path widths]: +/- 0.52
    * 1 sigma uncertainty interval [seconds]: +/- 3.1
    * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .034 +/- .024)
    * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .024", 86° )
    * approx speed of asteroid's shadow [km/s]: 10.2612
    * website for maps:
          http://www.asteroidoccultation.com