(2241) Alcathous Jupiter Trojan

Discovered on 22 November 1979 by C. T. Kowal at Palomar.

Where Alcathous is today

MercuryVenusEarthEarthMarsMarsJupiterJupiterAlcathousAlcathous

Seen from above the solar system on 2026-10-14: Alcathous is 5.46 au from the Sun and 4.66 au from Earth. Computed from JPL's orbital elements.

Facts

Number2241
Provisional designation1979 WM
Orbit classJupiter Trojan
Diameter114 km (#182 largest of 17,440 named asteroids with a measured size)
Albedo0.0480
Rotation period7.69 hours
Spectral typeD
Absolute magnitude (H)8.52
Orbital period11.7 years
Semi-major axis5.17 au
Perihelion – aphelion4.82 – 5.51 au
Eccentricity0.0671
Inclination16.6°
Closest distance between its orbit and Earth's (MOID)3.86 au

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

More named asteroids discovered by C. T. Kowal