(523) Ada Main-belt Asteroid

Discovered on 27 January 1904 by R. S. Dugan at Heidelberg.

Where Ada is today

MercuryVenusEarthEarthMarsMarsAdaAda

Seen from above the solar system on 2026-10-14: Ada is 2.53 au from the Sun and 3.06 au from Earth. Computed from JPL's orbital elements.

Facts

Number523
Provisional designationA904 BA
Orbit classMain-belt Asteroid
Diameter31.9 km (#1,283 largest of 17,440 named asteroids with a measured size)
Albedo0.251
Rotation period10.0 hours
Spectral typeX
Absolute magnitude (H)10.01
Orbital period5.11 years
Semi-major axis2.97 au
Perihelion – aphelion2.43 – 3.50 au
Eccentricity0.181
Inclination4.31°
Closest distance between its orbit and Earth's (MOID)1.45 au

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

More named asteroids discovered by R. S. Dugan