Cees, Nice images. Years ago I saw several Space shuttles in earth shadow when the had the lights on in the payload bay. Leo Op di 24 mrt. 2020 om 00:27 schreef C. Bassa via Seesat-l < seesat-l_at_satobs.org>: > This subject used to be hot on SeeSat-L back in 1998, but this evening > I saw ISS where I did not expect to see it -- while ISS was in the > shadow of the Earth! > > I only noticed that my camera had captured ISS while processing the > results. I was very puzzled why ISS was not much much brighter. Only > after checking the time of the observation (21:15UTC), did I realize > ISS was already in the Earth's shadow and no longer illuminated by the > Sun. > > At 21:15UTC ISS was only about a minute after shadow entry, so some > stray sunlight may still have been illuminating ISS. Hence, I set up > the camera again for the next pass, that was predicted around > 22:53UTC. Passing close to Procyon, ISS was seen again. Shadow entry > on that pass was at 22:48UTC, so ISS was deep into the shadow. I > re-positioned the camera towards Spica to catch it later in the pass. > While not obvious, ISS was detectable after correcting for the > expected motion and averaging the moved frames. > > I've uploaded my images to this link: https://imgur.com/a/mDX2v6b. > > This clearly highlights the sensitivity of my setup, but also that ISS > is big enough to reflect what must be lights from bright cities while > passing over Europe. > > An unexpected first! > Cees > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Tue Mar 24 2020 - 00:39:14 UTC
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