(1139) Atami Mars-crossing Asteroid
Discovered on 1 December 1929 by Oikawa, O., Kubokawa, K. at Tokyo.
Where Atami is today
Seen from above the solar system on 2026-10-14: Atami is 2.29 au from the Sun and 2.71 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1139 |
| Provisional designation | 1929 XE |
| Orbit class | Mars-crossing Asteroid |
| Rotation period | 27.4 hours |
| Spectral type | S |
| Absolute magnitude (H) | 12.53 |
| Orbital period | 2.72 years |
| Semi-major axis | 1.95 au |
| Perihelion – aphelion | 1.45 – 2.45 au |
| Eccentricity | 0.256 |
| Inclination | 13.1° |
| Closest distance between its orbit and Earth's (MOID) | 0.470 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 1 December 1929
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