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Observing planner · engine.liveSky

Meridian Transit Planner

When a target crosses the meridian — its highest, sharpest point in the sky — the ideal moment to observe or image it. Computed from its right ascension and the local sidereal time.

Highlights

  • Catch a target at its highest

Across the suite

Knowledge connections

Sources

The primary and reference sources this topic draws on.

  • NASANational Aeronautics and Space Administration

    Mission data, planetary science, space telescopes, and public-domain imagery.

    Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.