(59381) Yannickmellier Main-belt Asteroid
Discovered on 16 March 1999 by ODAS at Caussols.
Yannick Mellier (1958–2025) was a French astrophysicist who pioneered work in gravitational lensing and cosmic shear. He contributed to the discovery of the first giant gravitational lens in the galaxy cluster Abell 370 and advanced dark-matter mapping via weak lensing.Naming citation (WGSBN Bull. 6, #2, 8), IAU / Minor Planet Center, via NASA/JPL
Where Yannickmellier is today
Seen from above the solar system on 2026-10-14: Yannickmellier is 2.64 au from the Sun and 1.68 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 59381 |
| Provisional designation | 1999 FZ5 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.94 km (#12,885 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0650 |
| Absolute magnitude (H) | 15.97 |
| Orbital period | 3.62 years |
| Semi-major axis | 2.36 au |
| Perihelion – aphelion | 2.07 – 2.65 au |
| Eccentricity | 0.121 |
| Inclination | 3.12° |
| Closest distance between its orbit and Earth's (MOID) | 1.08 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.