Hi,
Here are the finder charts from the Blue and Red plates of the DSS. As usual, each is 15 x 15 arcmin, north is up.
See also:
http://forum.hkas.org.hk/viewthread.php ... a=page%3D1
pts
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IOTA/IOTA-ES occultation update for
(136204) 2003 WL7 / UCAC2 43758656 event on 2011 Oct 11, 20:29 UT
Visible from China, Russia, Europe
Summary
-------
On 2011 Oct 11 UT, the 60 km diameter asteroid (136204) 2003 WL7 will occult a
12.1 mag star in the constellation Auriga for observers along a path across
China, Russia, Europe.
In the case of an occultation, the combined light of the asteroid and the star
will drop by 8.6 mag to 20.7 mag (the magnitude of the asteroid) for at most 8.2
seconds.
This update is based on historical astrometry from the MPC files (via AstDys),
and the following catalogs for the star position: UCAC.
The event at a glimpse
----------------------
* Rank: 0
* date and approx. time of event: 2011 Oct 11, 20:21 - 2011 Oct 11, 20:46 UT
* geocentric midpoint of event [JD]: 2455846.3557125
* magnitude of target star: 12.1
* magnitude drop [mag]: 8.6
* estimated maximum duration : 8.2
* Moon: 100 % sunlit, 67� distance
* Sun: 116� distance
* rough path description: China, Russia, Europe
The occultation path
--------------------
* approximate projected width [km]: 61
* 1 sigma uncertainty interval [path widths]: +/- 93.83
* 1 sigma uncertainty interval [seconds]: +/- 731.5
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .759 +/- .260)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .763", .249", 84� )
* approx speed of asteroid's shadow [km/s]: 7.3841
* website for maps:
http://www.asteroidoccultation.com
Asteroid occultation event in the early morning of Oct 12
Asteroid occultation event in the early morning of Oct 12
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Occultation early tomorrow morning
It seems the chance is slim.
pts
pts
誰在線上
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