(43) Ariadne Main-belt Asteroid
Discovered on 15 April 1857 by N. R. Pogson at Oxford.
Where Ariadne is today
Seen from above the solar system on 2026-10-14: Ariadne is 2.43 au from the Sun and 3.12 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 43 |
| Provisional designation | A857 GA |
| Orbit class | Main-belt Asteroid |
| Diameter | 71.3 km (#453 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.234 |
| Rotation period | 5.76 hours |
| Spectral type | S |
| Absolute magnitude (H) | 7.92 |
| Orbital period | 3.27 years |
| Semi-major axis | 2.20 au |
| Perihelion – aphelion | 1.83 – 2.57 au |
| Eccentricity | 0.168 |
| Inclination | 3.47° |
| Closest distance between its orbit and Earth's (MOID) | 0.818 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.