(6403) Steverin Main-belt Asteroid
Discovered on 8 July 1991 by E. F. Helin at Palomar.
Named for Steven Newburn and Erin Fischer on the occasion of their marriage. Steven is the son of Ray Newburn, science coordinator for near-Earth objects at the Jet Propulsion Laboratory and former co-leader of the International Halley Watch. Both young people greatly enjoyed their college astronomy courses, although neither plans a career in science.Naming citation (WGSBN Bull. 5, #28, 6), IAU / Minor Planet Center, via NASA/JPL
Where Steverin is today
Seen from above the solar system on 2026-10-14: Steverin is 2.88 au from the Sun and 2.67 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6403 |
| Provisional designation | 1991 NU |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.88 km (#7,795 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.492 |
| Rotation period | 3.49 hours |
| Absolute magnitude (H) | 13.06 |
| Orbital period | 4.18 years |
| Semi-major axis | 2.59 au |
| Perihelion – aphelion | 2.28 – 2.91 au |
| Eccentricity | 0.123 |
| Inclination | 14.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.30 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Steven
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- (14438) MacLean
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All asteroids named after someone called Steven