Asteroid occultation in the early morning of May 14, 2013

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

Asteroid occultation in the early morning of May 14, 2013

文章 PTS » 週日 12 5月, 2013 22:43

I have prepared finder charts from DSS and The Sky 6.
Please aslo refer to:
http://occultation.freebbs.tw/viewthrea ... a=page%3D1

==============================
IOTA/IOTA-ES occultation update for
(2195) Tengstrom / TYC 6202-00202-1 event on 2013 May 13, 21:30 UT
Visible from SE Asia, India, Arabia, Africa


Summary
-------
On 2013 May 13 UT, the 13 km diameter asteroid (2195) Tengstrom will occult a
10.2 mag star in the constellation Scorpius for observers along a path across SE
Asia, India, Arabia, Africa.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 5.1 mag to 15.3 mag (the magnitude of the asteroid) for at most 1.2
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: 17
* date and approx. time of event: 2013 May 13, 21:22 - 2013 May 13, 21:39 UT
* geocentric midpoint of event [JD]: 2456426.3964875
* magnitude of target star: 10.2
* magnitude drop [mag]: 5.1
* estimated maximum duration [s]: 1.2
* Moon: 13 % sunlit, 150� distance
* Sun: 166� distance
* rough path description: SE Asia, India, Arabia, Africa

The occultation path
--------------------
* approximate projected width [km]: 16
* 1 sigma uncertainty interval [path widths]: +/- 3.97
* 1 sigma uncertainty interval [seconds]: +/- 8.1
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .085 +/- .048)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .085", .048", 96� )
* approx speed of asteroid's shadow [km/s]: 10.5606
* website for maps:
http://www.asteroidoccultation.com
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