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(295) Theresia occults TYC 1845-02748-1

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About this observation
Observer
Alex Pratt
Time of observation
06/01/2018 - 18:45
Object
Asteroid (295) Theresia and star TYC 1845-02748-1
Observing location
Z92
Equipment
C11 f/10 and f/3.3 focal reducer
Watec 910 video camera
IOTA-VTI GPS time inserter
OccuRec recorder
Tangra and AOTA
Exposure
1/25th sec
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The mag 13.5 33km diameter asteroid (295) Theresia was predicted to occult the mag 10.8 star TYC 1845-02748-1 on 2018 January 6 for up to 5.7 seconds. My observatory was within the predicted shadow zone.

The predicted probability of success was 55% and I recorded an occultation duration of 3.76s and the times of disappearance and reappearance were:-

D     18:45:52.16

R     18:45:55.92

The attached plot shows the analysis of the light curve using Tangra and AOTA software.

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