(9542) Eryan Main-belt Asteroid

Discovered on 12 October 1983 by E. Bowell at Anderson Mesa.

Eileen V. Ryan (b. 1960), of New Mexico Highlands University, has contributed to the field of fragmentation studies of minor planets by conducting laboratory impact experiments and developing numerical simulations. Recently, she has helped initiate an observational program to study minor planets of the Vesta family.Naming citation (20010109/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL

Where Eryan is today

Seen from above the solar system on 2026-10-14: Eryan is 2.61 au from the Sun and 3.58 au from Earth. Computed from JPL's orbital elements.

Facts

Number	9542
Provisional designation	1983 TU1
Orbit class	Main-belt Asteroid
Rotation period	2.79 hours
Absolute magnitude (H)	13.65
Orbital period	3.71 years
Semi-major axis	2.40 au
Perihelion – aphelion	2.12 – 2.68 au
Eccentricity	0.117
Inclination	8.29°
Closest distance between its orbit and Earth's (MOID)	1.12 au

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

Also named after someone called Eileen

All asteroids named after someone called Eileen

Also discovered on 12 October 1983

More named asteroids discovered by E. Bowell

All 554

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