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ISS lunar transit, 31st March 2020


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About this observation
Chris Hooker
Time of observation
31/03/2020 - 20:47
International Space Station
Observing location
Didcot, Oxfordshire
254 mm Newtonian
2x & 1.6x Barlows, stacked
ZWO ASI174 mono camera
Baader IR-cut filter
0.18 msec

The ISS pass on 31st March was predicted to transit the first-Quarter Moon at 20.47 pm. Tracking the pass allowed me to capture a few frames with the ISS against the Moon as a background, and those frames have been combined into this mosaic. The ISS was sunlit at the time, so rather than being a pure silhouette, it shows contrasting detail. The solar arrays are almost the same tone as the lunar maria, so are hard to spot, but the dark strips extending ahead of the station are heat radiator panels mounted next to the arrays, and they are in shadow. The bright areas are also heat radiator panels, but those are in sunlight. The individual images are rather noisy because high gain was used to reduce the exposure time and reduce blurring, and of course in the circumstances no stacking was possible.

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