Planetary data for Neptune
- Planetary data for Neptune
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Planetary data for Neptune
mean distance from Sun 4,498,250,000 km (30.1 AU)
eccentricity of orbit 0.0086
inclination of orbit to ecliptic 1.77°
Neptunian year (sidereal period of revolution) 163.72 Earth years
visual magnitude at mean opposition 7.8
mean synodic period* 367.49 Earth days
mean orbital velocity 5.48 km/sec
equatorial radius** 24,764 km
polar radius** 24,340 km
mass 1.02 x 1026 kg
mean density 1.64 g/cm3
gravity** 1,115 cm/sec2
escape velocity** 23.5 km/sec
inclination of equator to orbit 29.6°
magnetic field strength at equator (
mean) 0.14 gauss
tilt angle of magnetic axis 46.8°
offset of magnetic axis 0.55 of Neptune's radius
number of known moons 13
planetary ring system 6 rings, one containing several arcs
*Time required for the planet to return to the same position in the sky relative to the Sun as seen from Earth.
**Calculated for the altitude at which one bar of atmospheric pressure is exerted.
See as table:
* * *
Universalium.
2010.
Look at other dictionaries:
neptune — /nep toohn, tyoohn/, n. any whelk of the genus Neptunea, esp. N. decemcostata, common along the eastern coast of North America and having a shell with seven to ten raised reddish brown spiral ridges on a pale beige or yellow background. [ < NL… … Universalium
Neptune — /nep toohn, tyoohn/, n. 1. the ancient Roman god of the sea, identified with the Greek god Poseidon. 2. the sea or ocean: Neptune s mighty roar. 3. Astron. the planet eighth in order from the sun, having an equatorial diameter of 30,200 mi.… … Universalium
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Neptune X — Psamathée (lune) Pour les articles homonymes, voir Psamathée. Psamathée Caractéristiques orbitales (Époque 10/06/2003, JJ 2452801.5[1] … Wikipédia en Français
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