Asteroid occultation on March 09, 2013

[PTS]

Hi,
I have prepared finder charts for this event from Digital Sky Survey and The Sky 6.
Finder charts are 15 x 15 arcmin.

See also:
http://occultation.freebbs.tw/viewthrea ... a=page%3D1


PTS
===============================================IOTA/IOTA-ES occultation update for
(748) Simeisa / TYC 1242-00432-1 event on 2013 Mar 09, 12:08 UT
Visible from Taiwan, S China


Summary
-------
On 2013 Mar 09 UT, the 112 km diameter asteroid (748) Simeisa will occult a 10.8
mag star in the constellation Aries for observers along a path across Taiwan, S
China.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 4.4 mag to 15.2 mag (the magnitude of the asteroid) for at most 3.9
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: 67
* date and approx. time of event: 2013 Mar 09, 12:10 - 2013 Mar 09, 12:12 UT
* geocentric midpoint of event [JD]: 2456361.00604583
* magnitude of target star: 10.8
* magnitude drop [mag]: 4.4
* estimated maximum duration [s]: 3.9
* Moon: 7 % sunlit, 96° distance
* Sun: 66° distance
* rough path description: Taiwan, S China

The occultation path
--------------------
* approximate projected width [km]: 112
* 1 sigma uncertainty interval [path widths]: +/- 0.89
* 1 sigma uncertainty interval [seconds]: +/- 3.4
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .039)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .039", 88° )
* approx speed of asteroid's shadow [km/s]: 28.9702
* website for maps:
http://www.asteroidoccultation.com

[PTS]

Reminder:
It seems the sky will be clear tonight.

pts

[PTS]

It is positive!

Preliminary times:

time BEFORE star disappears: 12:11:18.679 UTC
time when star disappears: 12:11:18.712 UTC

time BEFORE star reappears: 12:11:22.483 UTC
time when star reappears: 12:11:22.516

Duration of occultation: 3.8 seconds


pts