Larissa (moon of Neptune)

Document v1 · published by Koskamo · updated 2026-10-05

Larissa is a natural satellite of Neptune in the NASA/JPL Solar System Dynamics planetary satellite tables.

Planet: Neptune
Satellite: Larissa
Satellite code: 807
GM: 0.25484 ± 3.12230 km³/s² (ephemeris NEP097)
Mean Radius: 96.00 ± 7.00 km (reference 1)
Mean Density: 1.0303 ± 12.626 g/cm³ (NASA note: Mean Density is derived from the specified GM and Mean Radius.)
Ephemeris: NEP097
Reference frame: Laplace
Epoch (TDB): 2000-01-01.5
Semi-major axis a: 73500. km
Eccentricity e: 0.001
Argument of periapsis ω: 247.3 deg
Mean anomaly M: 165.5 deg
Inclination i: 0.2 deg
Longitude of ascending node: 312.0 deg
Sidereal period P: 0.554989 days
Argument of periapsis precession period: 1.257 yr
Longitude of ascending node precession period: 2.514 yr
Laplace-plane pole right ascension: 299.8 deg
Laplace-plane pole declination: 43.1 deg
Laplace-plane tilt: 0.4 deg
Mean elements reference: 24

Source and provenance

Original source: ssd.jpl.nasa.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: NASA/JPL Solar System Dynamics planetary satellite mean elements and physical parameters (ssd.jpl.nasa.gov/sats), a work of the US government (public domain in the United States)

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Version history

Published by Koskamo2026-10-05
Version 1