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Minimum elevation objects should reach in the sky.
DST applied to GMT offsets.
Build and share your astrophotographer profile for free!
Set time, date, aiming point, orbital elements to track a comet or asteroid, and many other settings. You can bookmark your searches, allowing direct access to your preferences.
Get object data, cross-identifications, measurements and bibliography for deep sky objects. You can query by coordinates, object name, and other criteria.
Virtual Observatory to see images of any part of the celestial sphere at wavelengths from Radio to Gamma-Ray.