(29085) Sethanne Main-belt Asteroid
Discovered on 17 September 1979 by Harvard Observatory at Harvard.
Sethanne Howard (b. 1944) has held positions with U.S. national observatories, NASA, the National Science Foundation and, during 2000--2003, as chief of the U.S. Nautical Almanac Office. Her research specialty is galactic dynamics. She has also been active in science education, concentrating on the history of women in science.Naming citation (20030806/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Sethanne is today
Seen from above the solar system on 2026-10-14: Sethanne is 2.82 au from the Sun and 3.81 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 29085 |
| Provisional designation | 1979 SD |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.25 km (#14,600 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.383 |
| Absolute magnitude (H) | 14.75 |
| Orbital period | 4.44 years |
| Semi-major axis | 2.70 au |
| Perihelion – aphelion | 2.51 – 2.89 au |
| Eccentricity | 0.0720 |
| Inclination | 3.88° |
| Closest distance between its orbit and Earth's (MOID) | 1.50 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.