yes Guiseppe, the angular diameter is wrong when you click on a dot on the centerline, but the size given in the main passage and transit page is good. I doubt that with orbital data deduced from amateur observations, the accuracy would be sufficient for a transit! If you got a dark dot on your images, you'll have to check that the trajectory and speed of the object is consistent with Calsky calculations. So many objects are able to make moving dark dots: birds, bats, insects etc. regards Thierry Legault www.astrophoto.fr At 20:34 19/04/2011, you wrote: >9h32m48.60s >CalSky-Details. 22.Apr.2011 9h32m48.60s: >Lacrosse 3 (25017 1997-064-A) in front of Sun. >Transit-Duration: 1.47s, path width: 15.58km. >Diameter of Lacrosse 3 (25017 1997-064-A): 42.33" > > > > > >The above is obtained by clicking on one spot of >"Centerline". It says angular diameter 42.33" > >Below is the message from alert manager. > >Although my location is a couple of Kms far from >the centerline, PA, transit duration and >separation obviously change, but angular >diameter should not (at least not 12fold) . Any hints? > > 9h32m48.46s Lacrosse 3 > (25017 1997-064-A) Crosses the disk of > Sun. Separation=0.246° Position Angle=330.6°. Transit duration=0.55s > Angular diameter=3.5" cylindrical, 18.0m x 4.5m > Satellite at Azimuth=106.5° ESE Altitude= 33.0° Distance=1100.1 km > In a clock-face concept, the satellite will seem to move toward 8:30 > Angular Velocity=21.8'/s > > > > > >Giuseppe > >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: >http://mailman.satobs.org/mailman/private/seesat-l/attachments/20110419/c7683f33/attachment.html > >-------------- next part -------------- >A non-text attachment was scrubbed... >Name: not available >Type: image/png >Size: 2814 bytes >Desc: not available >Url : >http://mailman.satobs.org/mailman/private/seesat-l/attachments/20110419/c7683f33/attachment.png > >_______________________________________________ >Seesat-l mailing list >http://mailman.satobs.org/mailman/listinfo/seesat-l Thierry Legault www.astrophoto.fr _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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