(4544) Xanthus Apollo
Discovered on 31 March 1989 by Holt, H. E., Thomas, N. G. at Palomar.
Where Xanthus is today
Seen from above the solar system on 2026-10-14: Xanthus is 0.930 au from the Sun and 1.49 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4544 |
| Provisional designation | 1989 FB |
| Orbit class | Apollo · near-Earth |
| Diameter | 1.30 km (#17,389 largest of 17,440 named asteroids with a measured size) |
| Rotation period | 37.6 hours |
| Absolute magnitude (H) | 17.39 |
| Orbital period | 1.06 years |
| Semi-major axis | 1.04 au |
| Perihelion – aphelion | 0.781 – 1.30 au |
| Eccentricity | 0.250 |
| Inclination | 14.1° |
| Closest distance between its orbit and Earth's (MOID) | 0.174 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.