Recent content by Moon_1975

Hi All, I have a photo of the ISS and i wanted to calculate its absolute magnitude. I've found the pixel value for a point on ISS and i have also found the pixel value for an identified star in the background. How would I calculate the ISS absolute magnitude and apparent magnitude from the...

Thanks, I was thinking, would it not just be possible to use normal trig taking the opp angle as that of 800km and the angle of 20 degrees to calculate the distance from observer to the satellite? so sin20 (opp/hyp) and find for hyp David

Hi all, thanks for the information. BrianJ - you suggested the angle of view which if i'm right, using the equation on http://en.wikipedia.org/wiki/Angle_of_view and my known sensor size and f length i have calculated the satellite distance in degrees per second. I'm struggling however to...

Hi All, I'm having difficultly with some data i have. I have captured a passing satellite using my nikon DSLR, and using a timed exposure the satellite travelled 430x10-6m (from the pixels) in 5 seconds. The satellite was at a rough height of 800km and at an altitude of 20 degrees. i've...