(4664) Hanner Main-belt Asteroid

Discovered on 14 August 1985 by E. Bowell at Anderson Mesa.

Named in honor of Martha S. Hanner, planetary scientist at the Jet Propulsion Laboratory who specializes in ground-based and space studies of particulate matter in the solar system, especially cometary dust. Her publications attest to her work as an enthusiastic observer of comets at infrared wavelengths, as an organizer of the P/Halley infrared monitoring program at the Infrared Telescope Facility on Mauna Kea, as a champion of improvements in infrared photometric standards, and on the nature of zodiacal light. She has investigated the formation of infrared spectral features in dust and the scattering properties of dust. Hanner is an energetic supporter of better science education for young people, to which end she has been a teacher and organizer of space science seminars for science teachers. Citation provided by Ray L. Newburn at the request of the discoverer.Naming citation (WGSBN Bull. 4, #9, 4), IAU / Minor Planet Center, via NASA/JPL

Where Hanner is today

Seen from above the solar system on 2026-10-14: Hanner is 3.03 au from the Sun and 3.32 au from Earth. Computed from JPL's orbital elements.

Facts

Number	4664
Provisional designation	1985 PJ
Orbit class	Main-belt Asteroid
Rotation period	3.01 hours
Absolute magnitude (H)	12.57
Orbital period	4.90 years
Semi-major axis	2.89 au
Perihelion – aphelion	2.69 – 3.08 au
Eccentricity	0.0664
Inclination	1.49°
Closest distance between its orbit and Earth's (MOID)	1.68 au

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

Also named after someone called Martha

All asteroids named after someone called Martha

Also discovered on 14 August 1985

More named asteroids discovered by E. Bowell

All 554

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