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OCCULTATION OF UCAC4 364_066572 BY 184 Dejopeja
2015 January 19

A 2.36 second occultation was recorded by Brian Loader, using video OSD technique.

No clearly observed misses were recorded for this event.

View the Personal prediction.

  1    B Loader,Darfield,NZ                    
  2(P) Prediction, Personal, 19 Jan         


Dejopeja occultation__ 2015 January 19


The ellipse above is plotted at the maximum axis ratio as determined by lightcurve inversion data. With only one chord it is not possible to determine whether Brian was north or south of the central line of the event. However, assuming the updated prediction was approximately correct the close to expected maximum chord of about 65km would suggest that the chord might lie close to the central portion of the asteroid. We can be confident of the path of Dejopeja and that it was well north of the predicted line. The DAMIT 3D model has been overlaid on the measured ellipse and shows reasonable fit. The model has been adjusted in size to fit the ellipse of approximately the same area as the prediction of 65 km. There is not enough data to prefer one 3D model over the other one so the first one has been shown.

The figure below shows the Tangra light curve of Brian's occultation.

Dejopeja occultation__ 2015 January 19

Observational Data:

Observation details for MP ( 184 ) Dejopeja
By Star              UCAC4 364-066572
On 2015-01-19  at 14:46:20.0


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     Strong flickering Clear 
Camera Type  WAT910BD       AAV-PAL       
Camera Delay -0.1
Timing     GPS - time inserted Video with frame analysis
Disappearance  14:46:26.52
Reappearance   14:46:28.88
Comments: Occult Prediction: combined mag 12.2, 
expected d mag 1.9 (83%),
 Event T max 2.6 sec,
 Predicted time error 7s,
  Prob of event 10%
 Video capture using Occurec 


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