 S/2002 N 5 imaged by the Very Large Telescope in September 2002 | |
| Discovery[1][2] | |
|---|---|
| Discovered by | Matthew Holman John J. Kavelaars Tommy Grav Wesley Fraser |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 14 August 2002 |
| Designations | |
| c02N4[3] | |
| Orbital characteristics[4] | |
| Epoch 1 January 2020 (JD 2458849.5) | |
| Observation arc | 21.22 yr (7,752 d) |
| Satellite of | Neptune |
| Group | Sao group |
| Proper orbital elements | |
Proper semi-major axis | 23,414,700 km (0.156518 AU) AU |
Proper eccentricity | 0.433 |
Proper inclination | 46.3° (to ecliptic) |
Proper mean motion | 41.6561611 deg / yr |
Proper orbital period | 8.64218 yr (3156.556 d) |
Precession of perihelion | 451.707549 arcsec / yr |
Precession of the ascending node | 415.317659 arcsec / yr |
| Physical characteristics | |
| 24–38 km[a] 23 km[5][6] | |
| 25.9 (average)[5] | |
| 11.2[1] | |
S/2002 N 5 is a prograde irregular satellite of Neptune. It was discovered on 14 August 2002 by Matthew Holman, John J. Kavelaars, Tommy Grav, and Wesley Fraser using the 4.0-meter Víctor M. Blanco Telescope at Cerro Tololo Observatory, Chile, but it became lost and was not observed again until Scott S. Sheppard rediscovered it on 3 September 2021. The discovery of S/2002 N 5 was announced on 23 February 2024, after observations were collected over a long enough time to confirm the satellite's orbit.[1] S/2002 N 5 orbits Neptune at an average distance of over 23 million km (14 million mi) and takes almost 9 Earth years to complete its orbit.
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