(21553) Monchicourt Main-belt Asteroid
Discovered on 26 August 1998 by ODAS at Caussols.
Marie Odile Monchicourt (b. 1947) is a well-known French science journalist, producer and host on Radio-France and France television. Since her poussières d´étoiles (star dust) program (1984-1987), she has participated regularly in many programs on French radio and TV.Naming citation (20051215/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Monchicourt is today
Seen from above the solar system on 2026-10-14: Monchicourt is 2.44 au from the Sun and 3.21 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21553 |
| Provisional designation | 1998 QT55 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.45 km (#16,358 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.204 |
| Absolute magnitude (H) | 15.37 |
| Orbital period | 3.32 years |
| Semi-major axis | 2.23 au |
| Perihelion – aphelion | 1.86 – 2.59 au |
| Eccentricity | 0.165 |
| Inclination | 2.08° |
| Closest distance between its orbit and Earth's (MOID) | 0.845 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Marie
- (7490) Babicka
- (7972) Mariotti
- (8221) La Condamine
- (10183) Ampere
- (11090) Popelin
- (13705) Llapasset
- (15106) Swanson
- (15299) Radbo
- (20576) Marieoertle
- (21346) Marieladislav
- (24206) Mariealoia
- (25745) Schimmelpenninck
All asteroids named after someone called Marie
Also discovered on 26 August 1998
- (10637) Heimlich
- (12893) Mommert
- (12895) Balbastre
- (12896) Geoffroy
- (13293) Mechelen
- (21564) Widmanstatten
- (22692) Carfrekahl
- (22694) Tyndall
- (25029) Ludwighesse
- (28078) Mauricehilleman