(5999) Plescia Mars-crossing Asteroid
Discovered on 23 April 1987 by Shoemaker, C. S., Shoemaker, E. M. at Palomar.
Where Plescia is today
Seen from above the solar system on 2026-10-14: Plescia is 2.96 au from the Sun and 2.49 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5999 |
| Provisional designation | 1987 HA |
| Orbit class | Mars-crossing Asteroid |
| Diameter | 7.08 km (#7,545 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0670 |
| Rotation period | 5.39 hours |
| Absolute magnitude (H) | 14.64 |
| Orbital period | 3.44 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 1.58 – 2.98 au |
| Eccentricity | 0.305 |
| Inclination | 23.2° |
| Closest distance between its orbit and Earth's (MOID) | 0.732 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.