"Sean Sullivan <email@example.com>" <firstname.lastname@example.org> said: > >In response to your post on Chandra's brightness. My calculations: >Perigee is aronud 10,000 km post-thrusting, I think. That makes perigee >16 times farther than Hubble. Assuming same intrinsic magnitude, that >makes Chandra 1/16^2 (1/256) as bright. That's almost exactly 6 >magnitudes fainter. If Hubble is around +1 or +0 on favorable passes, >that makes a perigee Chandra around +7 or +6. > >Of course, perigee passes aren't that common. And that's the key issue - with such an elliptical orbit it will spend very little time at perigee. Still, it ought to be interesting to try for the more experienced observers. I don't believe I've ever seen a satellite with that high an apogee in orbit! >Well, I figure you got to see it in the clean room. I'll have to settle >for my backyard :) Nope. Didn't get to see either FUSE or AXAF. Something about not only no - but hell no. Sheesh - just because a single molecular layer of skin oil would contaminate the optics ... Philip Chien, KC4YER Earth News world (in)famous writer, science fiction fan, ham radio operator, all-around nice guy, etc.