Thanks, Richard. I was amazed that the furthest end of the plume appeared to be so far in front of the two craft. I think some of this had to be due to parallax. Could solar wind also be a factor? -----Original Message----- From: Richard Harshaw Sent: Monday, May 30, 2011 6:23 AM To: az-observing@xxxxxxxxxxxxx Subject: [AZ-Observing] Re: Endeavor & ISS Flyover this morning Great shot! But I am curious. The shuttle was moving at a pretty good clip, so how does the plume move so far away from the trajectory so fast? It looks roughly like the plume was moving at about half the shuttle's speed. That's an awful fast displacement for a vapor dump. Anyone have any ideas? Richard Harshaw Cave Creek, Arizona Brilliant Sky Observatory -----Original Message----- From: az-observing-bounce@xxxxxxxxxxxxx [mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Peg & Sam Sent: Monday, May 30, 2011 4:26 AM To: az-observing@xxxxxxxxxxxxx Subject: [AZ-Observing] Endeavor & ISS Flyover this morning I got up early this morning to catch the pair over Tucson at 3:19 am local. Was pleasantly surprised to see Endeavor(?) performing some type of dump. At least I think it was the shuttle because it was the dimmer of the two. The plume from this event was pretty neat. http://www.balinka.com/Endeavor-ISS_0138_800.jpg - Sam -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.