My thanks to all who responded to my inquiry. There were several days around last weekend when no messages showed up on the BBS I use, and I wondered if I missed anything important. That must have been when the the news about Mir's orbital boost appeared. I'll check the archives for further details as you suggested. Mike McCants observed: MM>But you should be aware that TrakSat oftens predicts that objects MM>are not in the Earth's shadow even when they are. Does anyone have a comparison of satellite tracking programs' predictions of orbital eclipse? Is there a program that predicts this reliably?