A 2nd Asteroid occultation event on October 08, 2011

Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
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PTS
夸克星
文章: 17242
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

A 2nd Asteroid occultation event on October 08, 2011

文章 PTS » 週六 27 8月, 2011 17:38

Hi,
Here are the finder charts.
Please see also:
http://forum.hkas.org.hk/viewthread.php ... a=page%3D2


pts
---------------------------------------------------------------
IOTA/IOTA-ES occultation update for
(593) Titania / TYC 1341-01578-1 event on 2011 Oct 08, 16:07 UT
Visible from Japan, S China


Summary
-------
On 2011 Oct 08 UT, the 75 km diameter asteroid (593) Titania will occult a 11.3
mag star in the constellation Gemini for observers along a path across Japan, S
China.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 2.5 mag to 13.7 mag (the magnitude of the asteroid) for at most 4.6
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: 90
* date and approx. time of event: 2011 Oct 08, 16:02 - 2011 Oct 08, 16:09 UT
* geocentric midpoint of event [JD]: 2455843.17175833
* magnitude of target star: 11.3
* magnitude drop [mag]: 2.5
* estimated maximum duration : 4.6
* Moon: 90 % sunlit, 120� distance
* Sun: 97� distance
* rough path description: Japan, S China

The occultation path
--------------------
* approximate projected width [km]: 93
* 1 sigma uncertainty interval [path widths]: +/- 0.53
* 1 sigma uncertainty interval [seconds]: +/- 2.7
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .035 +/- .030)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .035", .030", 79� )
* approx speed of asteroid's shadow [km/s]: 16.3272
* website for maps:
http://www.asteroidoccultation.com
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PTS
夸克星
文章: 17242
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

reminder

文章 PTS » 週五 07 10月, 2011 09:19

2 events in one night!

pts

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