(3415) Danby Outer Main-belt Asteroid
Discovered on 22 September 1928 by K. Reinmuth at Heidelberg.
Where Danby is today
Seen from above the solar system on 2026-10-14: Danby is 4.82 au from the Sun and 5.79 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3415 |
| Provisional designation | 1928 SL |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 36.6 km (#1,085 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0630 |
| Rotation period | 5.67 hours |
| Absolute magnitude (H) | 11.01 |
| Orbital period | 7.89 years |
| Semi-major axis | 3.96 au |
| Perihelion – aphelion | 2.98 – 4.95 au |
| Eccentricity | 0.249 |
| Inclination | 1.37° |
| Closest distance between its orbit and Earth's (MOID) | 1.98 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.