(5917) Chibasai Main-belt Asteroid
Discovered on 7 July 1991 by E. F. Helin at Palomar.
The non-profit organization Chiba Science Association, or “Chiba Sai”, was formed on 2001 July 7. Some 300 members, including educators, scientists and science-inclined citizens, have contributed to the popularization of science among children in Chiba. The name was suggested by Y. Yamada.Naming citation (20091202/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Chibasai is today
Seen from above the solar system on 2026-10-14: Chibasai is 2.87 au from the Sun and 2.83 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5917 |
| Provisional designation | 1991 NG |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.1 km (#5,065 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.252 |
| Rotation period | 2.65 hours |
| Absolute magnitude (H) | 12.37 |
| Orbital period | 4.18 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 2.23 – 2.96 au |
| Eccentricity | 0.139 |
| Inclination | 14.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.24 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.