Tuesday, May 19, 2009

LACROSSE 4 SPY SATELLITE IMAGE REDUCTIONS BY GREG ROBERTS FROM IMAGES BY GERHARD GROENEWALD


lat:26°04'01.5"S, lon:30°07'01.6"E Observer time zone:UTC+2.0 satellite Lacrosse 4 int. des 2000-047A el. 66 2.9 rise 18:23:54 set 18:38:04 CANON 20D 28 MM Time taken 18.31.26 20 s exposure F5 ISO 1600 LEFT MAJOR STAR Alpha Canis Majoris and RIGHT Alpha Canis minoris LACROSSE 4 Orange streak from right below just entering field of view with a slight flare. Prediction by Heavensat ver 2.17 From this data available Greg Roberts member of seesat made the following findings: centre of field of view RA 07h48m16s Dec -07d 48' 28"( I bet you won’t get that right again by accident- I did not believe that the RA and Dec would have essentially the same digits but checked it in another astrometry program and its correct!) Field of view 43.38 x 28.94 degrees pixel size 244.00075 arc sec/pixel on the 2.5x reduced image so the true scale is 99".18 arc sec/pixel in raw format. The position of the end of Lacrosse 4 trail is RA 07h59m08s Dec +10d 42'04".Magnitude at brightest +3.3 and at end of trail +5.8 ( wouldn’t put too much faith in the magnitudes) limiting magnitude +7. Follow discussion at seesat


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