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Tuesday, April 21, 2009

Space Station over Kitt Peak

The International Space Station makes a very nice pass over the Spacewatch Telescope on Kitt Peak. This image was taken with my 24mm lens with an exposure of 30 seconds at f/3.5, ISO 400.
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Anonymous said...

With a regular binocular can one see its "wing" and body clearly?


Jim said...

The ISS is about 110 meters across (or will be soon when it is finished). It orbits on average at about 350 kilometers altitude, so applying a little trigonometry, the largest it will appear during a pass straight overhead will be about 1 arcminute. The Moon is about 30 arcminutes across. You ought to be able to see that it is not perfectly stellar, but you won't see too much more with binoculars. I would have looked at it with my binocs during this pass except I forgot to bring them with me. Give it a look, though & let me know!