Apsis
Related Category: Astronomy: General
(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.
apsis
Either of the points in the orbit of a celestial object that is farthest from or closest to the body being orbited. The closest point is the periapsis, the further point the apoapsis.
apsis
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Apsis
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Apoapsis
For an object moving in an elliptical orbit about another celestial body, the point of greatest separation is called the apoapsis (from the Greek apo = away from).
Apoapsis -- The farthest point in an orbit from the body being orbited.
Apogee -- Apoapsis in Earth orbit.
Apochron -- Apoapsis in Saturn orbit.
Apoapsis
the point in orbit farthest from the planet.
Apogee
the point in orbit farthest from the Earth.
PERIAPSIS - Point of closest approach for an object moving in an elliptical orbit about another celestial body. At this point in the orbit, the object is traveling at its greatest speed (Kepler's Second Law).
Periapsis
The point in the orbit of a satellite where it is closest to its primary.
Periastron ...
periapsis
The point in the orbit closest to the planet.
periastron
The point of closest approach of two stars, as in a binary star orbit.
Apsis
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apoapsis
The point in an orbit when the two objects are farthest apart. Special names are given to this orbital point for commonly used systems: see , , and .
APOAPSIS
For an object orbiting a celestial body, the apoapsis is the point in its orbit which is farthest from that body.
APOGEE
For an object orbiting the Earth, the apogee is the point in its orbit which is farthest from the Earth.
apoapsis That point in an orbit farthest from the center of attraction. apocenter = apofocus apocynthion That point in the orbit of a moon satellite which is farthest from the moon.
point the point that is directly on the opposite side of the planet aphelion the point in its orbit where a planet is farthest from the Sun; when refering to objects orbiting the Earth the term apogee is used; the term apoapsis is used ...
0011 Periapsis
1,069,200 km (0.007147 AU) Apoapsis
1,071,600 km (0.007163 AU) Revolution period
7.15455296 d (0.019588 a) Orbital circumference
6,725,500 km (0.045 AU) Orbital velocity
max: 10.892 km/s
mean: 10.880 km/s
min: 10.868 km/s Inclination
2.
Nozomi will be inserted into a highly eccentric Mars orbit with a periapsis 300 km above the surface, an apoapsis of 15 Mars radii, and an inclination of 170 degrees with respect to the ecliptic plane.
From Venus orbit insertion on December 4, 1978, to July 1980, periapsis was held between 142 and 253 km to facilitate radar and ionospheric measurements.
Comets, which are composed largely of volatile ices and whose orbits are highly eccentric, generally having a periapsis within the orbit of the inner planets and an apoapsis out past Pluto.
This contains the explanation of the motion of the apsis which had previously puzzled astronomers, ...
At its apoapsis (greatest distance), Nereid is nearly seven times as far from Neptune as at its periapsis (smallest distance). Even at its closest approach, Nereid is nearly four times the distance of Triton, Neptune's second most distant satellite.
The semimajor axis of a planetary orbit is also the average distance from the planet to its primary. The periapsis and apoapsis distances can be calculated from the semimajor axis and the eccentricity by rp = a(1-e) and ra = a(1+e).
Jovian Pertaining to the planet Jupiter. E.g. the apoapsis and periapsis of the Galilean moons are called apojove and perijove.
K
Kepler Elements Another term for orbital elements.
distance and time) around a star where the object's distance (on its elliptical orbit) from its parent star is farthest / closest. The terms apogee & perigee are used instead when referring to objects orbiting the Earth (e.g. the Moon); apoapsis ...
(b) NEAR's orbit around Icarus will have periapsis (closest approach) of about 45 km from the asteroid's center. If the mass of Eros is 2 1016 kg and NEAR's orbit has an eccentricity of 0.25, calculate the spacecraft's orbital period. (Hint) ...
 See also: Orbit, Planet, Earth, Solar, Period
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