Re: Geosat flaring season

From: Björn Gimle (
Date: Sun Sep 16 2012 - 09:53:30 UTC

  • Next message: Bram Dorreman: "SatObs 4160 (BD) 2012-09-15 (other than 12048A and 12048N-objects)"

    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 <>
    > 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.
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