Op 27-5-2011 06:00, Kevin Fetter schreef: > At spaceweather it says for Nanosail D > > The curious variations suggest that the sail is tumbling > > And I thought if a satellite was observed flashing, means it's rotating, such as I have observed in no longer used geo sat's, and other things like AEHF 1 was after it was launched, dsp satellites and so on. > > Must be a fiqment of my imagination. > > Kevin Rotating, tumbling: two words for basically the same thing: movement around an axis. With a rotation I think of a spin around a stable pointing axis (indicating attitude control): with tumbling of a spinning motion with the direction of the spin axis (attitude) not controlled. With Nanosail, the latter is more likely imho. So I think tumbling is the correct word. - Marco ----- Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. e-mail: sattrackcam@wanadoo.nl Cospar 4353 (Leiden): 52.15412 N, 4.49081 E (WGS84), +0 m ASL Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html Station (b)log: http://sattrackcam.blogspot.com ----- _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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