Sunday, December 04, 2005
Satellites, star trails and nebulae
They might be hard to see, but this image of the Orion Nebula and the belt stars of Orion also show a few geosynchronous satellites. My Canon 20D was set on a tripod with my 70-300mm zoom set to 70mm. Stars trailed in the 30 second exposure while the geosynchronous satellites are stationary on the frame and appear as faint stars. Trouble is, the cameras detector generates similar looking noise, but luckily the (at least) 3 satellites all appear in a straight line and are white in color. Two of the satellites are on the lower right edge of this frame very close together and are aligned roughly with the star trails. The exposurfe was 30 seconds at f/4, ISO 1600.