(9799) Thronium Jupiter Trojan
Discovered on 8 September 1996 by T. B. Spahr at Catalina Station.
Thronium, near the river Boagrius, was one of the places from which the Locrians joined the Achean forces.Naming citation (WGSBN Bull. 1, #1, 11), IAU / Minor Planet Center, via NASA/JPL
Where Thronium is today
Seen from above the solar system on 2026-10-14: Thronium is 5.43 au from the Sun and 6.30 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9799 |
| Provisional designation | 1996 RJ |
| Orbit class | Jupiter Trojan |
| Diameter | 68.0 km (#490 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0600 |
| Rotation period | 21.5 hours |
| Absolute magnitude (H) | 9.64 |
| Orbital period | 11.8 years |
| Semi-major axis | 5.19 au |
| Perihelion – aphelion | 4.95 – 5.43 au |
| Eccentricity | 0.0469 |
| Inclination | 30.5° |
| Closest distance between its orbit and Earth's (MOID) | 4.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 8 September 1996
More named asteroids discovered by T. B. Spahr
- (6534) Carriepeterson
- (7476) Ogilsbie
- (7605) Cindygraber
- (7784) Watterson
- (7835) Myroncope
- (7885) Levine
- (11596) Francetic
- (12008) Kandrup
- (17601) Sheldonschafer
- (17602) Dr. G.
- (22449) Ottijeff
- (24827) Maryphil
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