Hi All, Roland Stalder made a remarkable time lapse of flaring geosats in March 2011, here is a link to the Spaceweather.com March 14 archive with a wmv file: http://www.spaceweather.com/archive.php?view=1&day=14&month=04&year=2011 Cheers, Dan Laszlo NCAS Ft Collins CO USA On Sun, Sep 16, 2012 at 3:53 AM, Björn Gimle <bjorn.gimle@gmail.com> wrote: > > I forgot to mention that I have found ( at least for me, unfamiliar with > the stars below the equator ) to find them is to place a digital camera on > a tripod and take images, and inspect them immediately. I used a simple > camera, but it was capable of setting up to 60s exposure time. I used > 400-800 ASA setting. The long exposure makes it easy to distinguish the > satellite dots from the star streaks on the camera display, at least when > zooming in on the display, or using a short zoom in, or a short tele lens. > > 2012/9/12 Björn Gimle <bjorn.gimle@gmail.com> > > > > > Yes, for many satellites in the Clarke belt (geostationary, operational) > > it's when the Sun's declination matches the the declination of the > > satellites. For your latitude this is -5.7 degrees, and occurs around > > Oct.7. The most likely satellites would be opposite to the Sun in RA, but > > the radius of the Earth's shadow is nearly eight degrees, so between +- 58 > > degrees latitude this point is in shadow, and you must look a little left > > or right of this point. > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: http://mailman.satobs.org/mailman/private/seesat-l/attachments/20120916/cda2573e/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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