Hi all, Observing every kind of satellites I take routinely a lot of photos mostly using a 200mm teleobjective mounted on a Canon EOS 6D (field 10° x 7°). In fact I may use apertures from 28 mm to 600 mm, allowing for naked eye satellites up to 14th magnitude ones as well, such as Molniya objects at their apogee. As an example, I have been taking more than 26 000 astro photos in 2015 , an average of 200 photos per observing night. That's why every couple of months I will find a few UNIDs on my photos. On 17 FEB 2016 I imaged a rather bright UNID slowly moving in MON, then another UNID moving in ORI on 18 FEB 2016. That's entirely possible - yet not obvious - it was the same satellite. Both UNIDs were observed in the southern Alps : 44.57 N ; 6.68 E ; 1850m a.s.l. Alain GRYCAN (Toulouse) computed the following positions from both sets of photos : 50002 50 002A 1002 G 20160217181029440 15 25 0640135+065020 50002 50 002A 1002 G 20160217181043690 15 25 0640593+065411 50002 50 002A 1002 G 20160217181057940 15 25 0641424+065815 50003 50 003A 1002 G 20160218182025000 15 25 0536393+012036 50003 50 003A 1002 G 20160218182146000 15 25 0543555+020901 50003 50 003A 1002 G 20160218182343000 15 25 0553422+031338 Then he derived these elements assuming it was the same object : UNID 20160218-3 1 00000U 16049.76646991 0.00000073 00000-0 50000-4 0 00 2 00000 28.7459 47.0875 0003599 251.1392 148.8929 3.93900000 01 We would like to know if these elements may match those of whatever lost satellite. Of course we will try to observe this object again, weather permitting. Regards Alain Figer https://www.flickr.com/groups/satellites_artificiels/discuss/ Alain Figer 44.57 ; 6.68 E ; 1850m a.s.l. _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Wed Feb 24 2016 - 04:25:56 UTC
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