Hi,
The 2nd asteroid occultation even will be in the early morning of June 24, as given by WC Yue :
http://forum.hkas.org.hk/redirec ... o=lastpost#lastpost
I've prepared finder charts for this event.
PTS
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IOTA/IOTA-ES occultation update for
(163) Erigone / TYC 0634-00468-1 event on 2009 Jun 23, 20:08 UT
Visible from Taiwan, Hong Kong
Summary
-------
On 2009 Jun 23 UT, the 73 km diameter asteroid (163) Erigone will occult a 10.2
mag star in the constellation Aries for observers along a path across Taiwan,
Hong Kong.
In the case of an occultation, the combined light of the asteroid and the star
will drop by 4.5 mag to 14.7 mag (the magnitude of the asteroid) for at most 2.0
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: 83
* date and approx. time of event: 2009 Jun 23, 20:05 - 2009 Jun 23, 20:06 UT
* midpoint of event [JD]: 2455006.33894167
* magnitude of target star: 10.2
* magnitude drop [mag]: 4.5
* estimated maximum duration : 2.0
* Moon: 2 % sunlit, 70° distance
* Sun: 55° distance
* rough path description: Taiwan, Hong Kong
The occultation path
--------------------
* approximate projected width [km]: 85
* 1 sigma uncertainty interval [path widths]: +/- 0.63
* 1 sigma uncertainty interval [seconds]: +/- 1.2
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .024 +/- .024)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .024", .024", 359° )
* approx speed of asteroid's shadow [km/s]: 36.9290
* website for maps:
http://www.asteroidoccultation.com |
發表於 2009-6-8 10:39:33