A 2nd asteroid occultation on Mar 09, 2013

Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
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PTS
夸克星
文章: 6305
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

A 2nd asteroid occultation on Mar 09, 2013

文章 PTS » 週六 02 3月, 2013 10:24

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
(107) Camilla / TYC 0727-00676-1 event on 2013 Mar 09, 16:07 UT
Visible from S China, India, Africa


Summary
-------
On 2013 Mar 09 UT, the 267 km diameter asteroid (107) Camilla will occult a 11.0
mag star in the constellation Taurus for observers along a path across S China,
India, Africa.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 2.1 mag to 13.0 mag (the magnitude of the asteroid) for at most
21.5 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly
provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill
Owen, historical astrometry from the MPC files (via AstDys), and the following
catalogs for the star position: UCAC.

The event at a glimpse
----------------------
* Rank: 100
* date and approx. time of event: 2013 Mar 09, 16:06 - 2013 Mar 09, 16:16 UT
* geocentric midpoint of event [JD]: 2456361.1720875
* magnitude of target star: 11.0
* magnitude drop [mag]: 2.1
* estimated maximum duration [s]: 21.5
* Moon: 6 % sunlit, 126° distance
* Sun: 99° distance
* rough path description: S China, India, Africa

The occultation path
--------------------
* approximate projected width [km]: 270
* 1 sigma uncertainty interval [path widths]: +/- 0.15
* 1 sigma uncertainty interval [seconds]: +/- 3.1
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- .018 +/- .019)
* 1 sigma uncertainty ellipse (major, minor, PA): ( .019", .018", 360° )
* approx speed of asteroid's shadow [km/s]: 12.3944
* website for maps:
http://www.asteroidoccultation.com
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PTS
夸克星
文章: 6305
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

Observation of this 2nd occultation is undrway

文章 PTS » 週六 09 3月, 2013 21:43

The sky is very clear tonight.
Stars fainter than 16th mag are recorded with my StellarCam III, at just 10 second exposures.

Asteroid Camilla is located and is seen moving towards the target star.

pts

PTS
夸克星
文章: 6305
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

This 2nd event is negative

文章 PTS » 週日 10 3月, 2013 07:58

It is negative.
We observed until 15 minutes AFTER the predicted time but the target star was visible all the time.

pts

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