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Lunar occultation of double star SAO 164809


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About this observation
Alex Pratt
Time of observation
29/10/2017 - 19:26
SAO 164809
Observing location
C11 @ f/10
Watec 910 video camera
Losmandy G11 mount
IOTA-VTI GPS video time inserter
1/50th sec exposures
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In the Occult4 prediction for this event it lists the star as mag 7.6 (component A mag 7.67, component B mag 10.17) with a double star step duration of 0.7 sec.

Analysis of the video using Limovie gives estimated mags of 7.8 and 9.4, with a step of 0.459s. The data in the Interferometric Catalogue (all from 1991) give estimates of 7.7 - 8.1 and 9.5 - 10.4, respectively.

Tim Haymes also recorded this occultation from Reading, a baseline of ~200 miles, so we're hopeful that if we have favourable lunar limb geometry we can derive the PA and separation of this close double (1991: 50 degrees and 0.4"). 

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