(861) Aida Main-belt Asteroid

Discovered on 22 January 1917 by M. F. Wolf at Heidelberg.

Where Aida is today

MercuryVenusEarthEarthMarsMarsAidaAida

Seen from above the solar system on 2026-10-14: Aida is 3.05 au from the Sun and 2.07 au from Earth. Computed from JPL's orbital elements.

Facts

Number861
Provisional designationA917 BF
Orbit classMain-belt Asteroid
Diameter66.8 km (#502 largest of 17,440 named asteroids with a measured size)
Albedo0.0571
Rotation period10.9 hours
Absolute magnitude (H)9.78
Orbital period5.57 years
Semi-major axis3.14 au
Perihelion – aphelion2.83 – 3.45 au
Eccentricity0.0991
Inclination8.06°
Closest distance between its orbit and Earth's (MOID)1.82 au

Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.

Also discovered on 22 January 1917

More named asteroids discovered by M. F. Wolf