This chart shows the differences between Larissa and Neptune. To change the planets/moons being compared, change one or more of the form fields at the bottom and click Refresh.

	Larissa	Neptune
Discovered By	H. Reitsema, W. Hubbard, L. Lebofsky, D. Tholen	Urbain Le Verrier, John Couch Adams, Johann Galle
Date of Discovery	1982	23 September 1846
Average Orbit Distance	73,548 km	4,498,396,441 km
Perihelion/Perigee (closest)	73,445 km	4,459,753,056 km
Aphelion/Apogee (farthest)	73,651 km	4,537,039,826 km
Equatorial Radius	97.0 km	24,622 km
Equatorial Circumference	609.5 km	154,704.6 km
Volume	3,822,996 km3	62,525,703,987,421 km3
Mass	4,945,605,829,220,740,000 kg	102,410,000,000,000,000,000,000,000 kg
Density	1.3 g/cm3	1.638 g/cm3
Surface Area	118,236.98 km2	7,618,272,763 km2
Equatorial Surface Gravity	0.035 m/s2	11.15 m/s2
Escape Velocity	297 km/h	84,816 km/h
Mean Orbit Velocity	34,693.4 km/h	19,566 km/h
Orbit Eccentricity	0.0014	0.00859048
Orbit Inclination to Ecliptic	0.205 degree	1.77 degrees
Orbit Circumference	462,115.49 km	28,263,736,967 km