(346889) Rhiphonos Centaur
Discovered on 28 August 2009 by at Zelenchukskaya Stn 84384 Kryachko, T. V..
Rhiphonos (Riphonus) was one of the commanders of the Centaurs who joined Dionysus in his campaign against India. Name suggested by A. Mimeev.Naming citation (MPC batch dated 2013-07-22), IAU / Minor Planet Center, via NASA/JPL
Where Rhiphonos is today
Seen from above the solar system on 2026-10-14: Rhiphonos is 15.5 au from the Sun and 16.5 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 346889 |
| Provisional designation | 2009 QV38 |
| Orbit class | Centaur |
| Diameter | 23.2 km (#1,837 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0620 |
| Absolute magnitude (H) | 12.0 |
| Orbital period | 35.4 years |
| Semi-major axis | 10.8 au |
| Perihelion – aphelion | 6.01 – 15.6 au |
| Eccentricity | 0.443 |
| Inclination | 19.9° |
| Closest distance between its orbit and Earth's (MOID) | 5.02 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.