S/2021 N 1
Moon· orbits Neptune
S/2021 N 1 — moon of Neptune.
Open in 3D viewSee S/2021 N 1 in the live, interactive 3D map
Key facts
Radius
12.5 km
1% of our Moon's radius
Orbit around Neptune
28.3 Earth years
10,321 Earth days
Science
Physical
- Radius (estimated)
- 12.5 km · 1% of our Moon's radius
- Sized from its brightness assuming a dark (~0.04) surface — never resolved, so the true diameter (~25 km) could be off by a factor of two.
Orbit around Neptune
- Distance from Neptune
- 0.345 AU
- From JPL orbital elements
- Orbital period
- 28.26 years
- From JPL orbital elements
- Eccentricity
- 0.4328
- From JPL orbital elements
- Inclination to the J2000 equator
- 129.25 °
- From JPL orbital elements
Radiation & temperature
- Insolation
- 0.0011 S⊕ · 1/912 of the sunlight Earth receives
- Computed from the distance to the Sun (inverse-square; Earth's sunlight = 1), before any atmosphere.
Discovery & history
- By
- S.S. Sheppard, D.J. Tholen, C. Trujillo, P.S. Lykawka
S/2021 N 1 is the provisional designation of a small moon of Neptune detected in 2021 by S.S. Sheppard and colleagues. It has not yet been given a permanent name, and little is known about it beyond its discovery and orbit.
Images
No resolved image of this moon has been released: telescopes and passing spacecraft have recorded it only as a faint point of light.