A 10 second occultation was recorded by Dave Herald, using an SCT Telescope and Watec 910BD camera.

View the IOTA update.

Observers:
  1    D Herald, Murrumbateman, New South Wales, Australia
  2(P) Prediction- IOTA Feed                

         



       

Discussion:

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

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

Herald:

Observational Data:

Observation details for MP ( 602 ) Marianna
By Star              HIP HIP97546
On 2017-06-23  at 09:25:39.0

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Observer   Dave Herald
Location   Murrumbateman, NSW, Australia
Longitude  +148:59
Latitude   -34:57
Altitude   594 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   40 cm
Seeing     Steady Clear 
Camera Type  Watec 910BD    PAL/CCIR      
Camera Delay 
Timing     GPS - time inserted Video with frame analysis
Disappearance  09:25:37.57
Reappearance   09:25:47.25
Comments: Fantastic light drop with Fresnel diffraction  Lightcurve from 09:24:20 to 09:26:59 by
Tangra v3.6.5 using AperturePhotometry/AverageBackground. Analysis by AOTA v4.3.1.1
Report prepopulated by IOTA Reporting Add-in for OW ver.1.8