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Video astrometry of comet 46P/Wirtanen

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About this observation
Observer
Alex Pratt
Time of observation
09/12/2018 - 21:32
Object
Comet 46P/Wirtanen
Observing location
Z92
Equipment
C11 f/10 @ f/3.3
Watec 910 video camera
IOTA-VTI GPS time inserter
OccuRec (recording)
Tangra (reduction)
Exposure
0.16s, 0.32s and 1.28s integrations
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Comet 46P/Wirtanen is now climbing out of the light-polluted murk that haunts my observing location, particularly at lower elevations.

Dec 9/10 brought long clear intervals - a welcome change from the current monsoon season - so it was an opportunity for some video astrometry of this comet. Shorter integrations were employed to measure the position of its central condensation for submission to the MPC. The image at the lower right is a median stack of 8 x 1.28s exposures, starting to show the inner regions of its large coma.

Its motion was measured to be 0.06"/s in RA and 0.13"/s in Dec as it heads towards Taurus, to hopefully put on a good show between the Hyades and Pleiades.

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