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OCCULTATION OF UCAC4 452-051741 BY 210 Isabella
2016 Feb 21


Dave Herald and Brian Loader have observed occultations by (210) Isabella.

View a prediction.

Observers:
  1    D Herald,Murrumbateman               
  2    B Loader,Darfield                    
  3(P) Prediction             

  
       

Isabella occultation__ 2016 Feb 21

Discussion:

While Brian and Dave are widely seperated, these observations are almost on the same chord across (210) Isabella. As such, this observation does not really confirm the shape model presented above nor does it indicate which part of Isabella is involved. These observations indicate a significant shift in the path south from the predicted line.

The figure below shows the Tangra light curve of Brians observation.

Isabella  occultation__ 2016 Feb 21

The figure below shows the Tangra light curve of Daves observation.

Isabella  occultation__ 2016 Feb 21

Observational Data:

Observation details for MP ( 210 ) Isabella
By Star              UCAC4 452-051741
On 2016-02-21  at 13:22:11.0

_______________________________

Observer   Dave Herald
Location   Murrumbateman
Longitude  +148:59
Latitude   -34:57
Altitude   594 m
Datum      WGS84
Telescope Newtonian
Aperture   40 cm
Seeing     Steady Clear 
Camera Type  Watec 910BD    PAL/CCIR      
Camera Delay 
Timing     GPS - time inserted Video with frame analysis
Disappearance  13:22:28.57
Reappearance   13:22:36.53
Comments:  Lightcurve from 00:00:00 to 13:23:08 by Tangra v3.5.5 using AperturePhotometry/AverageBackground. Analysis by AOTA v4.2.0.2. Report prepopulated by IOTA Reporting Add-in for OW ver.1.8

_______________________________

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 full moon
Camera Type  WAT910BD       AAV-PAL       
Camera Delay 
Timing     GPS - time inserted Video with frame analysis
Disappearance  13:18:13.99
Reappearance   13:18:22.47
Comments:  Lightcurve from 13:15:45 to 13:20:02 by Tangra v3.5.5 using AperturePhotometry/AverageBackground. Analysis by AOTA v4.2.0.1. Report prepopulated by IOTA Reporting Add-in for OW ver.1.8

        

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