Star trails and geostationary satellites

Tuesday, February 4th 2014

Normally when making star trail photographs, I take lots of short exposures and stack them together. Today I tried it the old fashioned way just for a change, and did a single exposure for two and a bit hours - the battery ran out before it got to the intended three hours. The benefit of doing it this way was that geostationary satellites show up in the long exposure as bright spots along the celestial equator.

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