(1689) Floris-Jan Main-belt Asteroid
Discovered on 16 September 1930 by H. van Gent at Johannesburg.
Where Floris-Jan is today
Seen from above the solar system on 2026-10-14: Floris-Jan is 1.95 au from the Sun and 0.963 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1689 |
| Provisional designation | 1930 SO |
| Orbit class | Main-belt Asteroid |
| Diameter | 13.7 km (#3,468 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.175 |
| Rotation period | 145 hours |
| Absolute magnitude (H) | 11.8 |
| Orbital period | 3.83 years |
| Semi-major axis | 2.45 au |
| Perihelion – aphelion | 1.95 – 2.95 au |
| Eccentricity | 0.206 |
| Inclination | 6.38° |
| Closest distance between its orbit and Earth's (MOID) | 0.961 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.