Larissa 1
Adjective(s) Unknown
Orbital properties
Aphelion/apoapsis Unknown
Perihelion/periapsis Unknown
Semi-major axis 73 548 ± 1 km
Orbital eccentricity 0.001393 ± 0.00008
Orbital period 0.55465332 ± 0.00000001 days
Average orbital speed Unknown
Physical properties
Radius 97 ± 3 km
Mass ~4.2×1018 kg (estimate)
Mean density ~1.2 g/cm³ (estimate)
Escape velocity ~0.076 km/s
Rotation period synchronous
Average surface temperature ~51 K mean
Apparent magnitude 21.5
Moons 0
Larissa is a natural satellite of the planet Neptune.


  • Larissa was officially discovered by the Voyager 2 spacecraft in 1989.
  • It takes Larissa 13 hours 20 minutes to orbit Neptune.
  • It is going to eventually impact Neptune or be broken apart by Neptune's gravity.
  • Larissa is covered with craters.

Neptunian Moons
Naiad Thalassa Despina Galatea Larissa S/ 2004 N1

Proteus Triton Nereid Halimede Sao Laomedeia Psamathe Neso

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.