Discovered by H. Reitsema, W. Hubbard, L.
Lebofsky, D. Tholen
Date of Discovery 1982
Distance from Neptune 73,550 km
Radius 104 × 89 km
Mass ???
Orbital Eccentricity 0.00139
Orbital Inclination 0.20°
Orbital Period 0.554654 day
Rotational Period ???
Density (gm/cm3) ???
Larissa was discovered from imagery from the Voyager 2 probe, and the pictures are quite fuzzy. There is no sign of geological activity or anything else interesting besides impact craters. It orbits in the same direction as Neptune's rotation.
Sources:
NASA.gov
space.com