(74503) Madola Main-belt Asteroid
Discovered on 23 February 1999 by D. Bergeron at Val-des-Bois.
Christian Marois (b. 1974), René Doyon (b. 1963) and David Lafrenière (b. 1978) developed instruments that allowed seeing an extrasolar planetary system. Doyon was director of the Mt. Mégantic Observatory; Marois and Lafrenière were postdoctoral fellows at the Herzberg Institute and the University of Toronto.Naming citation (20090409/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Madola is today
Seen from above the solar system on 2026-10-14: Madola is 2.88 au from the Sun and 3.08 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 74503 |
| Provisional designation | 1999 DN4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.48 km (#11,672 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0850 |
| Absolute magnitude (H) | 15.56 |
| Orbital period | 5.24 years |
| Semi-major axis | 3.02 au |
| Perihelion – aphelion | 2.46 – 3.57 au |
| Eccentricity | 0.185 |
| Inclination | 17.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.47 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Christian
- (3788) Steyaert
- (3905) Doppler
- (7393) Luginbuhl
- (12540) Picander
- (14613) Sanchez
- (15963) Koeberl
- (16984) Veillet
- (19992) Schonbein
- (22848) Chrisharriot
- (39814) Christianlegrand
- (42613) Schaller
- (55772) Loder
All asteroids named after someone called Christian