Asteroid occultation event in the early morning of Aug. 10,

[PTS]

Hi,
I've prepared finder charts for this event. Charts from DSS are 15 X 15 arcmin.
Please see also:
http://occultation.freebbs.tw/viewthrea ... a=page%3D1


pts
======================================== IOTA/IOTA-ES occultation update for
(89) Julia / TYC 1178-00829-1 event on 2013 Aug 09, 21:10 UT
Visible from Australia


Summary
-------
On 2013 Aug 09 UT, the 175 km diameter asteroid (89) Julia will occult a 12.1
mag star in the constellation Pegasus for observers along a path across
Australia.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 0.1 mag to 9.9 mag (the magnitude of the asteroid) for at most 19.4
seconds.

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

The event at a glimpse
----------------------
* Rank: 99
* date and approx. time of event: 2013 Aug 09, 20:59 - 2013 Aug 09, 21:15 UT
* geocentric midpoint of event [JD]: 2456514.3819875
* magnitude of target star: 12.1
* magnitude drop [mag]: 0.1
* estimated maximum duration [s]: 19.4
* Moon: 9 % sunlit, 161� distance
* Sun: 128� distance
* rough path description: Australia

The occultation path
--------------------
* approximate projected width [km]: 196
* 1 sigma uncertainty interval [path widths]: +/- 0.28
* 1 sigma uncertainty interval [seconds]: +/- 3.5
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .051 +/- .032)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .051", .032", 86� )
* approx speed of asteroid's shadow [km/s]: 9.0044
* website for maps:
http://www.asteroidoccultation.com