(30857) Parsec Main-belt Asteroid
Discovered on 31 December 1991 by E. W. Elst at Haute Provence.
To the nearest integer, the number of this minor planet represents one parsec in units of a trillion meters. The name was suggested by A. Nakamura.Naming citation (20080321/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Parsec is today
Seen from above the solar system on 2026-10-14: Parsec is 2.51 au from the Sun and 2.85 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 30857 |
| Provisional designation | 1991 YY |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.08 |
| Orbital period | 3.30 years |
| Semi-major axis | 2.22 au |
| Perihelion – aphelion | 1.86 – 2.57 au |
| Eccentricity | 0.160 |
| Inclination | 3.49° |
| Closest distance between its orbit and Earth's (MOID) | 0.876 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.