Hi Manmeet, All operating civilian satellites are very close to latitude 0, so their declination is about 1/6 of the observer latitude at all times, dates and (almost) azimuth. (Slightly less in the ESE or WSW). There are some military satellites operating at 5-10 degrees declination, to make tracking/listening more difficult (?) The satellites occupy most of the circumference of the Earth, but there are concentrations and (almost) gaps, so in some areas it is possible to select a better hour/date combination to have the object in such a gap. Non-operational geostationaries usually are put drifting slowly, and inclination will oscillate considerably over dozens of years. The best technique is to stack many short exposures, and discard those with tracks. /Björn 2012/1/26 manmeet virdi <manmeetvirdi@hotmail.com> > Hi Everybody, > ... > > Q)Will Mr Elahi will ever have scratch free Orion nebula? > > A) At that latitude and at that time (approx) of the year never. Right? So > if Iam also in same latitude as Mr Elahi is then I too can have scratch > filled Orion nebula. > Also at least that region of the sky (alt,az) will never go scratch less > because those satellites are in line of sight. Please confirm :-) > -- > ---------------------------------------- Björn Gimle, COSPAR 5919 59.2576 N, 18.6172 E, 23 m Phone: +46 (0)8 571 43 312 Mobile: +46 (0) 704 385 486 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.satobs.org/mailman/private/seesat-l/attachments/20120126/618c1370/attachment.html _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
This archive was generated by hypermail 2b29 : Thu Jan 26 2012 - 08:35:32 UTC