I separated John's gif animation into images (and doubled their size) and measured start and end coordinates of most UNID tracks, plus a star which appeared in five images? Then I fitted a linear extrapolation of each coordinate with time. Unfortunately, it's on my notebook, for which I left the charger at work. But I had time to make handwritten notes about the average deltaX;deltaY of each, and computed the following extrapolations for four minutes: (first nine lines for those who want to check my errors) ;;;;Pixels / 4 minutes;;;;;Degrees/4 min;; 2004-12-19 20:52;;RA;Dec;deltaX;deltaY;delta;angle;;az;alt; Astra 3A;02015B;04:31;-7.52;0.6;2.8;3;77.91;;degrees;;0.991 ;94070A ;Star;;;2257;-1026;2480;-24.45;;0.902;-0.410;0.991 ;UNID;;;293;585;655;63.40;;0.117;0.234;0.262 ;UNID rel star;;;-1964;1611;2540;;;-0.785;0.644;1.015 ;;;;25;-654 ;"UNID dRA; dDec";;;-2455;-654;2541;;;-0.982;-0.261;1.016 UNID;;RA;Dec 2004-12-19 20:50;;04:29:02;-7.651;;;1280;;;;;0.512 2004-12-19 20:54;;04:32:58;-7.389;;;960;;;;;0.384 Last two lines are extrapolated rough positions but good delta? And computed FOV 0.512*0.384 degrees. .xls available on request. /Björn > > In the shorter clip which I posted last night > the unidentifed object moving north to south could be SleighSat ( Norad > 251204 ) This high polar orbiting satellite is rapidly decaying and should > re-enter early on the morning of > December 25. > http://mysite.wanadoo-members.co.uk/satcom_transits/object1a.GIF ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Mon Dec 20 2004 - 17:28:10 EST
