An 8.72 second occultation was recorded by Steve Kerr, using Video OSD technique.

View the updated prediction.

Observers:
  1    S Kerr,Glenlee, Queensland, Australia
  2(P) Prediction 20 March

    

Discussion:

Lightcurve data by Stephens R.D. 2002 suggests that Tatjana has significant ecentricity. This is confirmed By Pierre Antonini 2007 who found Mr of .303 +/- 0.004

The ellipse above is plotted at the same area as a circle with the expected 106 km diameter of Tatjana. With only one chord it is not possible to determine whether Steve was north or south of the central line of the event nor what the angle of the major axis should be.

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

Observational Data:

Observation details for MP (769) Tatjana
By Star              TYC 6900-01669-1
On 2009-04-28  at 18:36:56.0

_______________________________

Observer   Stephen Kerr
Location   Glenlee, Queensland, Australia
Longitude  +150:30:0.8
Latitude   -23:16:9.6
Altitude   50 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   30 cm
Seeing     Steady Clear
Timing     GPS - time inserted Video with frame analysis
Disappearance  18:36:48.63
Reappearance   18:36:57.35
Comments: Video camera integrating with a exposure period of 40ms.