- The most favourable conditions for a total eclipse are when the Moon is at its perigee, Earth is farthest from the Sun (around July) and when the Sun is observed near zenith.
- Whereas the synodic period is 29.53 days, it takes 27.5 days for the moon to move in its elliptical orbit from perigee to perigee.
- But the orbit is elliptical, and when the Moon is near perigee (closest to Earth), it moves along its orbit more swiftly than it does when it is near apogee (farthest from Earth).
Late 16th century: from French périgée, via modern Latin from Greek perigeion 'close round the earth', from peri- 'around' + gē 'earth'.
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Saltos de línea: peri|gee
Definición de perigee en:
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