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:

With only one chord, it is not possible to determine whether Brian was north or south of the centre line of the event. The DAMIT model has been plotted centred on the observed chord.

Brian is uncertain as whether this was a genuine event, or an artifact of the weather. If it was genuine, the the centre line of the event would be slightly north and west of the predicted path.

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

Observational Data:

Observation details for MP ( 89 ) Julia
By Star              UCAC4 407-137629
On 2017-05-25  at 15:25:28.0

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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     Strong flickering Thin cloud < 2 95% moon 32° away
Camera Type  Watec 910BD    AAV-PAL       
Camera Delay 
Timing     GPS - time inserted Video with frame analysis
Disappearance  15:25:13.72
Reappearance   15:25:16.52
Comments: GAIA prediction.  Time 15:25:28 ± 3 sec.  T max 6.6 sec.  Dmag 0.26 = 21%.   Prob of event 55%.  Location ca 15 km inside the 150 km wide path 
The mid event time is 13 sec early.  Depth of apparent drop OK.   Short observed duration reasonable considering predicted position near path edge  
Could it be a real event?  Opinions wanted.  I suspect a thin fog/cloud effect.   B