(5575) Ryanpark Main-belt Asteroid
Discovered on 4 September 1985 by H. Debehogne at La Silla.
Sang H. (“Ryan”) Park (b. 1978), a member of the Jet Propulsion Laboratory's Solar System Dynamics Group, has been instrumental in advancing JPL's planetary ephemeris and gravity science efforts. He received a NASA Exceptional Achievement medal for his contribution to the GRAIL mission.Naming citation (MPC batch dated 2014-01-16), IAU / Minor Planet Center, via NASA/JPL
Where Ryanpark is today
Seen from above the solar system on 2026-10-14: Ryanpark is 3.67 au from the Sun and 4.66 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5575 |
| Provisional designation | 1985 RP2 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 4.84 hours |
| Absolute magnitude (H) | 12.93 |
| Orbital period | 5.40 years |
| Semi-major axis | 3.08 au |
| Perihelion – aphelion | 2.49 – 3.67 au |
| Eccentricity | 0.191 |
| Inclination | 0.596° |
| Closest distance between its orbit and Earth's (MOID) | 1.49 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.