(5123) Cynus Jupiter Trojan
Discovered on 28 January 1989 by Y. Oshima at Gekko.
Cynus was one of the locations from which the Locrians filled forty ships as part of the Greek armada that set out against Troy.Naming citation (WGSBN Bull. 1, #12, 5), IAU / Minor Planet Center, via NASA/JPL
Where Cynus is today
Seen from above the solar system on 2026-10-14: Cynus is 5.09 au from the Sun and 6.07 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5123 |
| Provisional designation | 1989 BL |
| Orbit class | Jupiter Trojan |
| Diameter | 35.4 km (#1,140 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.129 |
| Rotation period | 9.88 hours |
| Absolute magnitude (H) | 10.09 |
| Orbital period | 11.9 years |
| Semi-major axis | 5.22 au |
| Perihelion – aphelion | 4.68 – 5.75 au |
| Eccentricity | 0.102 |
| Inclination | 8.53° |
| Closest distance between its orbit and Earth's (MOID) | 3.70 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 28 January 1989
More named asteroids discovered by Y. Oshima
- (3843) OISCA
- (4157) Izu
- (4261) Gekko
- (4293) Masumi
- (4383) Suruga
- (4403) Kuniharu
- (4715) Medesicaste
- (4840) Otaynang
- (5206) Kodomonomori
- (5258) Rhoeo
- (5282) Yamatotakeru
- (5353) Baillie
← (5122) Mucha · (5124) Muraoka →