Neptune's Moon: Despina

Despina

Despina is close to Neptune's equatorial plane (about 27,000 kilometers - 17,200 miles) and orbits the planet every eight hours. Discovered in 1989 by Voyager 2 photographs, Despina is an oddly shaped satellite with a rather calm history (without too many violent geological upheavals common to many other satellites). Despina also rotates in the same direction Neptune orbits.

PHYSICAL DATA FOR DESPINA
Mass (kg)	?
Mass (Earth = 1)	?
Radius (km)	74
Radius (Earth = 1)	1.1602e - 02
Mean Density (g/cm³)	?
Mean Distance from Neptune (km)	52,500
Magnitude (V₀)	22.6

ORBITAL DATA FOR DESPINA
Rotational period (days)	?
Orbital period (days)	0.334655
Mean orbital velocity (km/s)	11.41
Orbital eccentricity	0.0001
Orbital inclination (degrees)	0.07
Escape (km/s)	?
Albedo	0.06

Physical Data Key

Mass	Mass
Mass	Mass compared to that of Earth.
Radius	Radius
Radius	Radius compared to that of Earth.
Mean Density	Average Density.
Distance	Distance to the planet's center.
Magnitude	The brightness of a star or object.

Orbital Data Key

Rotational Period	Number of days to make one complete rotation.
Orbital Period	Number of days to obital the planet.
Mean Orbital Velocity	Average obital speed.
Orbital Eccentricity	Eccentricity.
Orbital Inclination	The tilt of the moon or planet.
Escape	Escape Velocity.
Albedo	Visual geometric albedo.