Perigee - the point in the moon's orbit when it is closest to the earth; opposite of apogee
Perihelion - the point in the earth's orbit nearest the sun (147 million kilometers from the sun), on about 3 January; opposite of aphelion ...
Perigee The closest distance between moon and earth or the earth and sun.
Permanent Control A stream gaging control which is substantially unchanging and is not appreciably affected by scour, fill, or backwater.
PERIGEE The point nearest the earth on the moon's orbit. This term can be applied to any other body orbiting the earth, such as satellites. It is the opposite of apogee.
Perigee
The closest distance between moon and earth or the earth and sun.
Perihelion ...
Perigee (aka periapsis or perifocus) On an elliptical orbit path, the point where a satellite is closest to the Earth. See Keplerian elements.
5. The closest point (perigee) from the Earth is: 225,742 miles.
6. The moon completes one revolution around the earth in:
**29 days, 12 hours, 44 minutes, & 2.8 seconds.** ...
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Aphelion, apogee, Astronomical Unit, perigee, Perihelion, recurrence, Rotation, Solar Noon, Tidal Cycle, Tide Prediction ...
For example, the old oceanographic term for the lag in days between the occurrence of syzygy and the highest spring tide is the "age of the tide;" the lag between perigee and the highest perigean tide is the "age of parallax inequality." ...
 See also: Earth, Weather, Latitude, Pressure, Storm
  
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