(4788) Simpson Main-belt Asteroid

Discovered on 4 October 1986 by E. Bowell at Anderson Mesa.

Where Simpson is today

MercuryVenusEarthEarthMarsMarsSimpsonSimpson

Seen from above the solar system on 2026-10-14: Simpson is 2.30 au from the Sun and 2.62 au from Earth. Computed from JPL's orbital elements.

Facts

Number4788
Provisional designation1986 TL1
Orbit classMain-belt Asteroid
Diameter3.58 km (#13,742 largest of 17,440 named asteroids with a measured size)
Albedo0.500
Rotation period2.82 hours
Absolute magnitude (H)13.86
Orbital period3.40 years
Semi-major axis2.26 au
Perihelion – aphelion1.97 – 2.56 au
Eccentricity0.130
Inclination4.32°
Closest distance between its orbit and Earth's (MOID)0.977 au

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

Also discovered on 4 October 1986

More named asteroids discovered by E. Bowell