(29187) Le Monnier Main-belt Asteroid
Discovered on 16 October 1990 by E. W. Elst at La Silla.
Pierre Charles Le Monnier (1715–1799) was a French astronomer who, in 1736–1737, accompanied Maupertius and Clairaut on their expedition to Lapland. He introduced the use of the transit instrument at the Paris Observatory in 1741 and took into account the effects of nutation in the solar tables.Naming citation (WGSBN Bull. 2, #11, 6), IAU / Minor Planet Center, via NASA/JPL
Where Le Monnier is today
Seen from above the solar system on 2026-10-14: Le Monnier is 3.65 au from the Sun and 4.60 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 29187 |
| Provisional designation | 1990 US3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.1 km (#4,508 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0620 |
| Absolute magnitude (H) | 13.71 |
| Orbital period | 5.59 years |
| Semi-major axis | 3.15 au |
| Perihelion – aphelion | 2.63 – 3.67 au |
| Eccentricity | 0.165 |
| Inclination | 7.29° |
| Closest distance between its orbit and Earth's (MOID) | 1.64 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Pierre
- (2190) Coubertin
- (5439) Couturier
- (5442) Drossart
- (5523) Luminet
- (8190) Bouguer
- (10139) Ronsard
- (11401) Pierralba
- (11946) Bayle
- (12007) Fermat
- (12042) Laques
- (12324) Van Rompaey
- (12580) Antonini
All asteroids named after someone called Pierre
Also discovered on 16 October 1990
- (5135) Nibutani
- (5190) Fry
- (6317) Dreyfus
- (6606) Makino
- (6719) Gallaj
- (7650) Kaname
- (7763) Crabeels
- (8164) Andreasdoppler
- (9334) Moesta
- (9587) Bonpland
- (10769) Minas Gerais
- (12708) Van Straten