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OCCULTATION OF TYC 0253-00597-1 BY 258 Tyche
2012 June 25

A 1.48 second occultation was recorded by Brian Loader, using video OSD technique.

View the personal prediction.

  1    B Loader,Darfield,NZ
  2(P) Prediction, Pesonal 27 May


Tyche occultation - 2012 June 25


The circle above is plotted at the expected 64 km diameter of Tyche. With only one chord it is not possible to determine whether Brian was north or south of the central line of the event. There are two possible DAMIT 3D models for Tyche shown below.

Tyche occultation - 2012 June 25 Tyche occultation - 2012 June 25

With only one chord it is not possible to decide which is the more likely orientation. Should Tyche show become a candidate for occultation again we should try to make a effort to get at least 3 well spaced chords.

The figure below shows the Tangra light curve of the occultation.

Tyche occultation - 2012 June 25

Observational Data:

Observation details for MP ( 258 ) Tyche
By Star              TYC 0253-00597-1
On 2012-06-25  at 05:59:00.0


Observer   B. Loader
Location   Darfield,NZ
Longitude  +172:06
Latitude   -43:28
Altitude   210 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   25 cm
Seeing     Slight flickering Clear
Camera Type  WAT120N        PAL/CCIR
Camera Delay 0.09
Timing     GPS - time inserted Video with frame analysis
Disappearance  05:59:05.02
Reappearance   05:59:06.50
Comments: Sun altitude -10deg, target just over 2 deg from 30% lit moon.
The background was not completely dark and
speckled as a result.  


Return to 2012 occultation results

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