(9683) Rambaldo Main-belt Asteroid
Discovered on 24 September 1960 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Alfred E. Rambaldo (1879-1911), born on the island of Java, did extensive research on the upper layers of the atmosphere. He was also a great promoter of aviation, especially balloons/airships in the Netherlands and in the Dutch East Indies, where he died during a balloon accident. The name was suggested by W. A. Fröger.Naming citation (20010309/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Rambaldo is today
Seen from above the solar system on 2026-10-14: Rambaldo is 2.11 au from the Sun and 2.40 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9683 |
| Provisional designation | 4099 P-L |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.94 km (#15,377 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.170 |
| Absolute magnitude (H) | 15.46 |
| Orbital period | 3.43 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 1.93 – 2.63 au |
| Eccentricity | 0.154 |
| Inclination | 5.19° |
| Closest distance between its orbit and Earth's (MOID) | 0.933 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Alfred
- (7750) McEwen
- (8282) Delp
- (11422) Alilienthal
- (11519) Adler
- (11765) Alfredfowler
- (11769) Alfredjoy
- (12057) Alfredsturm
- (13058) Alfredstevens
- (13672) Tarski
- (14331) Alyankovic
- (24907) Alfredhaar
- (29227) Wegener
All asteroids named after someone called Alfred
Also discovered on 24 September 1960
- (1743) Schmidt
- (1744) Harriet
- (1776) Kuiper
- (1777) Gehrels
- (1795) Woltjer
- (1808) Bellerophon
- (1809) Prometheus
- (1810) Epimetheus
- (1811) Bruwer
- (1812) Gilgamesh
- (1846) Bengt
- (1868) Thersites