1. plural of perigee: the points in the orbit of the moon or a satellite at which it is closest to Earth
Usage: astronomy

Examples

• The moon’s perigees occur approximately every 27.3 days.
• Satellite operators must account for perigees when calculating orbital mechanics.
• During perigees, the moon appears larger and brighter in the sky.
• The spacecraft’s perigees were adjusted to optimize its mission parameters.
• Astronomers track the perigees of various celestial bodies orbiting Earth.
• The difference between perigees and apogees affects tidal forces on Earth.