The photo IMG_3518 perfectly shows what can be seen visualy. Three flashes and then 1 missing. See PPAS for more obs. Greetings, Leo Barhorst -----Oorspronkelijk bericht----- From: alain.figer@club-internet.fr Sent: Thursday, September 22, 2011 3:36 PM To: Seesat-L ; Bram Dorreman Subject: Flashing period of Ajisai (object 16908) at about 2.2 seconds Hi all, On sept 14th, I took 2 series of photographs of the nice flashing satellite Ajisai (EGP) 1986-61A, while it passed by Beta Ophiuci (21h04.5 UT) then by Eta Scuti (21h06.6 UT). At first glance, the flashing pattern varies significantly, because a lot of flashes are either missing or visible, however it was rather easy to discover that a same pattern is repeating every 2.2 seconds or so. The accuracy on this photometric period (2.2 plus or minus 0.15 second) was limited by a 'rough' calculus of the angular speed of the satellite. I couldn't measure it directly on the photographs as usual (each pic being of 4 second exposure time) because only dots are visible so that I cannot define accurately the very beginning and the very end of the 4-sec track. Otherwise it would be easy to guarantee a period at 0.01 sec, due to the sharpness of the dots. I issued as examples, 2 such photos on my Flickr's site : http://www.flickr.com/photos/25296169@N07/6169044892/in/photostream http://www.flickr.com/photos/25296169@N07/6169044856/in/photostream/ Alain Figer, France 2.128° E ; 48.673°N ; 170 m asl -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.satobs.org/mailman/private/seesat-l/attachments/20110922/73eac83c/attachment.html _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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