A 3 second occultation was recorded by Brian Loader, using an SCT Telescope and Watec 910BD camera.

View the IOTA update.

Observers:
  1    B Loader, Darfield, Canterbury, New Zealand
  2(P) Prediction- IOTA Feed                

         



       

Discussion:

The circle above is plotted at the expected diameter of Thusnelda. With only one chord, it is not possible to tell if Brian was north or south of the centre line of the event but he appears to have been close to it. The circle has been plotted centred on the observed chord.

The event appears to have been close to the predicted path.

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

Observational Data:

Observation details for MP ( 219 ) Thusnelda
By Star              TYC 5180-00463-1 
On 2017-05-27  at 13:43:23.0

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Observer   B. Loader
Location   Darfield
Longitude  +172:06
Latitude   -43:28
Altitude   210 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   25 cm
Seeing     Slight flickering Broken cloud 
Camera Type  WAT910BD       AAV-PAL       
Camera Delay 
Timing     GPS - time inserted Video with frame analysis
Disappearance  13:43:23.63
Reappearance   13:43:26.92
Comments:  Lightcurve from 13:43:14 to 13:43:40 by Tangra v3.6.5 using AperturePhotometry/AverageBackground. 
Analysis by AOTA v4.2.15.0. Report prepopulated by IOTA Reporting Add-in for OW ver.1.8