On 1/5/22 4:51 PM, C. Bassa via Seesat-l wrote: > > sunshade to reflect sunlight back to Earth. As the sunshade is fixed > to the telescope, whether the reflections reach Earth will depend on > the location of JWST in its SEL2 orbit, as well as its pointing > direction. This page shows that it can target angles from 85 to 135 > deg away from the sun: > https://jwst-docs.stsci.edu/jwst-observatory-characteristics/jwst-observatory-coordinate-system-and-field-of-regard/jwst-target-viewing-constraints Just in case you missed it "the sunshade is fixed to the telescope" means that when you aim the telescope at a star, the entire sunshield also has to move the same amount. I think it's more obvious if you watch this animation showing the range of motion and range of targets starting at 6:20 in the video (link should jump you to that spot) https://youtu.be/cp_7AJseYYc?t=380 It would be amazing if someone figured out exactly the angle/position of the sunshield versus the target that the telescope is pointing at. With enough observations we can get this within an arc second I would think. Although keep in mind it rolls while filming so the field of view doesn't rotate. Yikes - maybe it's too unpredictable? Anyway, being able to go onto heavens-above and get flare predictions for JWST would be fantastic. We could see flares at any time including midnight (unlike most satellite flares). - George _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Wed Jan 05 2022 - 18:56:03 UTC
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