In the Solar System · tracked live
Donaldjohanson
A main-belt asteroid about eight kilometres long, here because Lucy flew past it in April 2025 as a rehearsal for the Trojan asteroids it is really going to. It turned out to be two bodies stuck together at a narrow neck, and the flyby is the reason the photograph on this card exists at all. It is named after the palaeontologist who found the fossil Lucy, which is what the spacecraft is named after.
- Radius
- 2 km
- Around the equator
- 12 km
- From the Sun
- 423,237,707 km (-6,964 km/d)
- From the Earth
- 431,080,703 km (+2,018,733 km/d)
- A signal takes
- 24 min
Distances and speed are computed from JPL Horizons trajectories and are true of the date below, changing at the rate beside each.
Everything the map shows is worked out in your browser from published orbital data - nothing on it is a stored picture of where things were.