(20358) Dalem Main-belt Asteroid
Discovered on 25 April 1998 by E. W. Elst at La Silla.
Henri Dalem (b. 1951) is a specialist in data processing and the webmaster (marquis) of the international Holbach foundation. Also interested in eighteenth-century studies, he currently occupies himself with the origins of despotism.Naming citation (20060613/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Dalem is today
Seen from above the solar system on 2026-10-14: Dalem is 2.66 au from the Sun and 3.57 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20358 |
| Provisional designation | 1998 HD148 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.03 km (#8,887 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.233 |
| Absolute magnitude (H) | 13.51 |
| Orbital period | 4.19 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 2.21 – 2.98 au |
| Eccentricity | 0.148 |
| Inclination | 12.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.23 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Henri
- (2359) Debehogne
- (3820) Sauval
- (7763) Crabeels
- (8240) Matisse
- (8521) Boulainvilliers
- (10311) Fantin-Latour
- (11506) Toulouse-Lautrec
- (11763) Deslandres
- (12261) Ledouanier
- (12702) Panamarenko
- (12708) Van Straten
- (26183) Henrigodard
All asteroids named after someone called Henri
Also discovered on 25 April 1998
- (9130) Galois
- (9246) Niemeyer
- (11711) Urquiza
- (11712) Kemcook
- (11713) Stubbs
- (12095) Pinel
- (12100) Amiens
- (12524) Conscience
- (12526) de Coninck
- (13238) Lambeaux
- (16946) Farnham
- (17836) Canup