1 day / second
0.5 AU
52246 Donaldjohanson
Asteroid
A dark, carbonaceous asteroid orbiting in the main belt that was named after Donald Johanson, the paleoanthropologist who discovered the famous Lucy hominin fossil.
Key Facts
orbital regime | Asteroid Belt |
learn more | Wikipedia |
mass | 6.1880e+14 kg |
radius | 3.895 km |
hill radius | 1,361.987 km |
semi-major axis | 2.383 AU |
eccentricity | 0.187 |
inclination | 4.426º |
longitude of the ascending node | 262.777º |
argument of periapsis | 212.796º |
orbital period | 3.679 years |
discovery date | March 2, 1981 |
discovered by | Schelte J. Bus |
discovery site | Siding Spring Observatory |
name origins | Named after Donald Johanson, the American paleoanthropologist |
dimensions | 3.9 km in diameter |
albedo | 0.103 |
Spacecraft Visits
Lucy
Flyby
NASA
Launched in 2021, visited in 2025
Lucy will fly past the asteroid Donaldjohanson on April 20, 2025, marking the spacecraft's first asteroid encounter during its 12-year mission to explore Jupiter's Trojan asteroids.
Other Asteroids
Annefrank
Braille
Itokawa
Didymos
Bennu
Dinkinesh
