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Video astrometry of comet C/2018 Y1 (Iwamoto)


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About this observation
Alex Pratt
Time of observation
14/02/2019 - 23:24
Comet C/2018 Y1 (Iwamoto)
Observing location
C11 f/10 @ f/3.3
Watec 910 video camera
IOTA-VTI GPS time inserter
OccuRec (recording)
Tangra (reduction)
0.64s integrations
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At long last I managed to get some astrometry of this comet. Previous nights were forecast to be 'clear', but haze, thin cloud, poor transparency and occultation events delayed me from recording it.

The video camera was set to 0.64s integrations and videos of 1-minute duration were taken of a half-degree field around the comet. The MPC gave its sky motion to be 17"/min and the movement of the comet against the star background was clearly noticeable. Tangra analysed it as a Slow Flyby. In this example, 114 measures give its motion as 0.25"/sec in RA and 0.12"/sec in Dec,  equating to a sky motion of 0.277"/sec (16.6"/min).

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