Asteroid occultation in the early morning of Mar 27, 2013

Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
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PTS
夸克星
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Asteroid occultation in the early morning of Mar 27, 2013

文章 PTS » 週六 02 3月, 2013 11:10

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%3D2

PTS
===============================================IOTA/IOTA-ES occultation update for
(348) May / 2UCAC 23699448 event on 2013 Mar 26, 20:06 UT
Visible from S China


Summary
-------
On 2013 Mar 26 UT, the 81 km diameter asteroid (348) May will occult a 12.0 mag
star in the constellation Sagittarius for observers along a path across S China.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 3.3 mag to 15.2 mag (the magnitude of the asteroid) for at most 5.9
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: 79
* date and approx. time of event: 2013 Mar 26, 19:59 - 2013 Mar 26, 20:05 UT
* geocentric midpoint of event [JD]: 2456378.33755
* magnitude of target star: 12.0
* magnitude drop [mag]: 3.3
* estimated maximum duration [s]: 5.9
* Moon: 99 % sunlit, 94° distance
* Sun: 94° distance
* rough path description: S China

The occultation path
--------------------
* approximate projected width [km]: 100
* 1 sigma uncertainty interval [path widths]: +/- 0.69
* 1 sigma uncertainty interval [seconds]: +/- 3.7
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .025 +/- .026)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .025", 1° )
* approx speed of asteroid's shadow [km/s]: 13.7470
* website for maps:
http://www.asteroidoccultation.com
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