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Neptune III - 1989N6


Naiad, the last satellite discovered, is about 54 kilometers (33 miles) in diameter and orbits Neptune every 7 hours and 6 minutes about 23,200 kilometers (14,400 miles) above the clouds. It is irregularly shaped and shows no sign of any geological modification. Naiad circles the planet in the same direction as Neptune rotates, and remains close to Neptune's equatorial plane. The above image has been smeared so that Naiad appears highly elongated.

Naiad Statistics
 Discovered byVoyager 2 
 Date of discovery1989 
 Mass (kg)
 Equatorial radius (km)29 
 Equatorial radius (Earth = 1)4.5469e-03 
 Mean density (gm/cm^3)
 Mean distance from Neptune (km)48,000 
 Rotational period (days)
 Orbital period (days)0.294396 
 Mean orbital velocity (km/sec)11.86 
 Orbital eccentricity0.0003 
 Orbital inclination (degrees)4.74 
 Visual geometric albedo0.06 
 Magnitude (Vo)24.7 


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