| S/2003 J 9 | |
| Discovery Ref: |   |
| Discoverer: | Scott S. Sheppard David C. Jewitt Jan T. Kleyna Yanga R. Fernández |
| Discovery Site: | Mauna Kea Obs. |
| Discovered: | 6 February 2003 |
| Orbit Ref: |   |
| Epoch: | 17 December 2020 (JD 2459200.5) |
| Observation Arc: | 15.19 yr (5,545 d) |
| Eccentricity: | 0.1701900 |
| Period: | 2.10 yr (767.60 d) |
| Mean Anomaly: | 109.89836° |
| Mean Motion: | / day |
| Inclination: | 166.33403° 13.66597° |
| Asc Node: | 130.59522° |
| Arg Peri: | 45.62861° |
| Satellite Of: | Jupiter |
| Group: | Carme group |
| Mean Diameter: | ≈ |
| Albedo: | 0.04 |
| Magnitude: | 23.7 |
| Abs Magnitude: | 16.9 |
is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003.
is about 1 kilometre in diameter, and orbits Jupiter at an average distance of in 767.60 days, at an inclination of 166.3° to the ecliptic (166° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.17.
It belongs to the Carme group, made up of irregular retrograde moons orbiting Jupiter at a distance ranging between 23 and 24 Gm and at an inclination of about 165°.
This moon was once considered lost[1] [2] [3] [4] until November 2020, when the Minor Planet Center announced the recovery of S/2003 J 9 by Scott Sheppard in observations from September 2011 to April 2018.