Perigee - What does it mean?
perigee | |
(astronomy) The point, in an orbit about the Earth, that is closest to the Earth: the periapsis of an Earth orbiter.
* '>citation
(astronomy, more generally) The point, in an orbit about any planet, that is closest to the planet: the periapsis of any satellite.
* 1995 , John H. Rogers, The Giant Planet Jupiter , Cambridge University Press, ISBN 978-0-521-41008-3,
* 2002 , Serge Brunier, Solar System Voyage , Cambridge University Press, ISBN 978-0-521-80724-1,
* 2010 , Ruth Walker and Mary M. Shaffrey et al., Exploring Space: The High Frontier , Jones & Bartlett Learning, ISBN 978-0-7637-8961-9,
(possibly, archaic, outside, astrology) The point, in any trajectory of an object in space, where it is closest to the Earth.
perigee
English
Noun
(en noun)page 335:
- Conjunctions of I and II [Io and Europa] occur when they are near perigee' and apogee respectively; conjunctions of II and III [Europa and Ganymede] occur when II [Europa] is near ' perigee .
page 36:
- The resolution of the images obtained by this American probe [Messenger] will depend on its altitude [above Mercury] at any one time: about ten meters at perigee (200km altitude), but only one 1 km at apogee (15000km).
page 129:
- [Nereid’s] apogee—farthest point from Neptune—is five times the distance of its perigee —its closest point.