(1686) De Sitter Main-belt Asteroid
Discovered on 28 September 1935 by H. van Gent at Johannesburg.
Where De Sitter is today
Seen from above the solar system on 2026-10-14: De Sitter is 3.47 au from the Sun and 3.01 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1686 |
| Provisional designation | 1935 SR1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 29.7 km (#1,378 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0880 |
| Rotation period | 11.3 hours |
| Absolute magnitude (H) | 11.16 |
| Orbital period | 5.63 years |
| Semi-major axis | 3.16 au |
| Perihelion – aphelion | 2.66 – 3.66 au |
| Eccentricity | 0.158 |
| Inclination | 0.616° |
| Closest distance between its orbit and Earth's (MOID) | 1.65 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 28 September 1935
- (1389) Onnie
- (1986) Plaut
- (2019) van Albada
- (2203) van Rhijn
- (2801) Huygens
- (2945) Zanstra
- (4296) van Woerkom
- (4359) Berlage
- (4511) Rembrandt
More named asteroids discovered by H. van Gent
- (1132) Hollandia
- (1133) Lugduna
- (1165) Imprinetta
- (1225) Ariane
- (1226) Golia
- (1267) Geertruida
- (1336) Zeelandia
- (1337) Gerarda
- (1342) Brabantia
- (1353) Maartje
- (1383) Limburgia
- (1384) Kniertje
← (1685) Toro · (1687) Glarona →