(1198) Atlantis Mars-crossing Asteroid
Discovered on 7 September 1931 by K. Reinmuth at Heidelberg.
Where Atlantis is today
Seen from above the solar system on 2026-10-14: Atlantis is 2.09 au from the Sun and 1.84 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1198 |
| Provisional designation | 1931 RA |
| Orbit class | Mars-crossing Asteroid |
| Rotation period | 16.0 hours |
| Spectral type | L |
| Absolute magnitude (H) | 14.37 |
| Orbital period | 3.38 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 1.50 – 3.00 au |
| Eccentricity | 0.335 |
| Inclination | 2.73° |
| Closest distance between its orbit and Earth's (MOID) | 0.491 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.