(3391) Sinon Jupiter Trojan
Discovered on 18 February 1977 by Kosai, H., Hurukawa, K. at Kiso.
Where Sinon is today
Seen from above the solar system on 2026-10-14: Sinon is 5.34 au from the Sun and 6.31 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3391 |
| Provisional designation | 1977 DD3 |
| Orbit class | Jupiter Trojan |
| Diameter | 37.9 km (#1,034 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0930 |
| Rotation period | 8.13 hours |
| Absolute magnitude (H) | 10.37 |
| Orbital period | 12.2 years |
| Semi-major axis | 5.29 au |
| Perihelion – aphelion | 4.85 – 5.73 au |
| Eccentricity | 0.0823 |
| Inclination | 14.9° |
| Closest distance between its orbit and Earth's (MOID) | 3.91 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 18 February 1977
- (2330) Ontake
- (2924) Mitake-mura
- (2960) Ohtaki
- (3249) Musashino
- (3607) Naniwa
- (4186) Tamashima
- (4812) Hakuhou
- (4963) Kanroku
- (5017) Tenchi
- (5082) Nihonsyoki
- (7104) Manyousyu
- (7105) Yousyozan