moon completes one Revolution around the earth in secs is?
Answers
Answer:
The Moon orbits Earth in the prograde direction and completes one revolution relative to the stars in about 27.32 days (a sidereal month) and one revolution relative to the Sun in about 29.53 days (a synodic month).
Answer:
The Moon orbits Earth in the prograde direction and completes one revolution relative to the stars in about 27.32 days (a sidereal month) and one revolution relative to the Sun in about 29.53 days (a synodic month). Earth and the Moon orbit about their barycentre (common center of mass), which lies about 4,600 km (2,900 mi) from Earth's center (about 72% of its radius). On average, the distance to the Moon is about 385,000 km (239,000 mi) from Earth's center, which corresponds to about 60 Earth radii or 1.282 light-seconds.
Orbit of the Moon
Diagram of the Moon's orbit with respect to the Earth
Diagram of the Moon's orbit with respect to the Earth.
While angles and relative sizes are to scale, distances are not.
Property Value
Semi-major axis[1] 384,748 km (239,071 mi)[2]
Mean distance[3] 385,000 km (239,000 mi)[4]
Inverse sine parallax[7] 384,400 km (238,900 mi)
Perigee
(i.e. min. distance from Earth) 363,228.9 km (225,700.0 mi) (avg.)
(356400–370400 km)
Apogee
(i.e. max. distance from Earth) 405,400 km (251,900 mi) (avg.)
(404000–406700 km)
Mean eccentricity 0.0549006
(0.026–0.077)[5]
Mean obliquity 6.687° [8]
Mean inclination
of orbit to ecliptic 5.15° (4.99–5.30)[5]
of lunar equator to ecliptic 1.543°
Period of
orbit around Earth (sidereal) 27.322 days
orbit around Earth (synodic) 29.530 days
precession of nodes 18.5996 years
precession of line of apsides 8.8504 years
With a mean orbital velocity of 1.022 km/s (0.635 miles/s),[9] the Moon covers a distance approximately its diameter, or about half a degree on the celestial sphere, each hour. The Moon differs from most satellites of other planets in that its orbit is close to the ecliptic plane instead of that of its primary (in this case, Earth's) equatorial plane. The Moon's orbital plane is inclined by about 5.1° with respect to the ecliptic plane, whereas the Moon's equatorial plane is tilted by only 1.5