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ISS Moon transit exposure settings?
The ISS will transit the Moon this evening (in Sydney), in the Northwest sky, about 30 minutes after official sunset. I am wondering what exposure to set on my ASI1600MC. I will use a 0.5x reducer making the focal length about 1,000 mm and will set the gain quite high, at say 300, to enable a faster frame rate. The obvious thing would be to set exposure time for the Moon, in the very low millisecond range. What I am not sure about is the brightness of ISS in comparison to the Moon. Will is be visible as it approaches and passes the Moon? Will it show in silhouette or simply vanish as it actually transits the Moon, which will take less than a second?
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