perigee


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perigee

(pĕr`ĭjē), point nearest the earth in the orbit of a body about the earth. See apsisapsis
(pl. apsides), point in the orbit of a body where the body is neither approaching nor receding from another body about which it revolves. Any elliptical orbit has two apsides.
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perigee

(pe -ră-jee) The point in the orbit of the Moon or an artificial Earth satellite that is nearest the Earth and at which the body's velocity is maximal. Strictly, the distance to the perigee is taken from the Earth's center. The distance to the Moon's perigee varies; on average it is about 363 300 km. Compare apogee.

Perigee

(religion, spiritualism, and occult)

Every orbit is elliptical. When a satellite is closest to Earth, it is at its perigee (from the Greek peri, meaning “near,” and gaia, meaning “earth”).

Perigee

 

the point in the orbit of the moon or an artificial satellite that is nearest the earth. Perturbations change the position of the perigee in space. Thus, because of perturbations caused by the sun, the moon’s perigee moves along an orbit in the same direction as the moon, completing a revolution in 8.85 years. The shift in the perigee of an artificial earth satellite chiefly arises from the aspherical nature of the earth, and the magnitude and direction of this motion depend on the inclination of the orbital plane of the satellite to the plane of the earth’s equator. The distance from the perigee to the center of the earth is called the perigee distance.

perigee

[′per·ə‚jē]
(astronomy)
The point in the orbit of the moon or other satellite when it is nearest the earth.

perigee

the point in its orbit around the earth when the moon or an artificial satellite is nearest the earth

apogee

The farthest point. It often refers to the point at which a commercial satellite is farthest from the earth in its elliptical orbit. The "perigee" is the point closest to the earth.
References in periodicals archive ?
The calculated times of the full Moon and lunar perigee in January 1912 were separated by only six minutes.
Today's lunar perigee combines with tomorrow's full "Supermoon" to create a strong likelihood of heavy precipitation, followed by severe cold.
At perigee, the supermoon can appear almost 30 times brighter and 14 percent larger than a regular full moon. The supermoon is expected to reach the peak of its phase on Nov.
Perigee and apogee each happen generally once a month, but the moon's wobbly orbit means that its exact distance at each of those events varies over the year.
and reaches perigee, its position closest to Earth, today, as well.
Full Moons come 29 1/2 days apart on average, so they don't stay in sync with apogee and perigee. If you could see a full Moon near perigee side by side with one near apogee, as shown at right, the difference in apparent size would be quite obvious.
Moon, May 2007 Full Moon May 2, 10:09 UT Last quarter May 10, 4:27 UT New Moon May 16, 19:27 UT First quarter May 23, 21:03 UT Perigee May 15, 15 (h) UT (dist.
Less well-known (or obvious) than the phases of a new and full moon are lunar perigee and lunar apogee.
This phenomenon is scientifically called "perigee moon." This happens when the full moon of our celestial neighbour is on the perigree side of its elliptical orbit making it appear relatively big and bright.
Perigee full moon or perigee new moon was the former name of supermoon before it became supermoon.
Astronomers call this phenomenon a "perigee moon," which describes the full moon that occurs when the moon is at its closest point to Earth each year.
The technical term for a supermoon is perigee-syzygy Moon, or perigee moon.