(1738) Oosterhoff Main-belt Asteroid
Discovered on 16 September 1930 by H. van Gent at Johannesburg.
Where Oosterhoff is today
Seen from above the solar system on 2026-10-14: Oosterhoff is 2.10 au from the Sun and 2.95 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1738 |
| Provisional designation | 1930 SP |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.89 km (#6,693 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.341 |
| Rotation period | 4.45 hours |
| Spectral type | S |
| Absolute magnitude (H) | 12.7 |
| Orbital period | 3.23 years |
| Semi-major axis | 2.18 au |
| Perihelion – aphelion | 1.74 – 2.63 au |
| Eccentricity | 0.204 |
| Inclination | 4.87° |
| Closest distance between its orbit and Earth's (MOID) | 0.735 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.