Preliminary report Asteroid occultation event on 2019 August 24

Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
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Preliminary report Asteroid occultation event on 2019 August 24

文章 PTS » 週日 25 8月, 2019 00:51

Preliminary report
Asteroid occultation event on 2019 August 24

As Hokoon is holding its monthly "open night", I arrived at Hokoon before 10:30 UTC.
The prediction from Asteroidoccultation.com suggests observation to start on 13:14 UTC. However, there is some high cloud which interfere with identification of the target star. When the target star field was finally locked, it was already 13:20:49 UTC. This is also the time when recording started.
As transparency is bad, an exposure of 200 ms second is required, dictating a temporal resolution to 200 ms. Despite some slight improvement of the transparency as observation continues, he exposure is maintained.
From intensive monitoring the target star until 13:46:07 UTC, no occultation was observed.
Before drawing a conclusion, I'll take time to check the ~7600 frames.
Telescope: 50-cm RC reflector f/8
Camera: ASI1600MM Pro, cooled to -7.5C
Binning: 3x3
exposure: 200 ms
south is up, east to the left
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