(31673) Nayessda Main-belt Asteroid
Discovered on 7 May 1999 by CSS at Catalina.
Nayessda “Nayi” Castro (b. 1987), American engineer, is the Deputy Mission Operations Manager for the OSIRIS-REx Asteroid Sample Return Mission. She has previously worked on NASA's TRMM, Terra and LRO Mission Operations Teams.Naming citation (WGSBN Bull. 3, #6, 10), IAU / Minor Planet Center, via NASA/JPL
Where Nayessda is today
Seen from above the solar system on 2026-10-14: Nayessda is 2.61 au from the Sun and 2.14 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31673 |
| Provisional designation | 1999 JZ8 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.73 km (#5,974 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0550 |
| Absolute magnitude (H) | 14.29 |
| Orbital period | 3.72 years |
| Semi-major axis | 2.40 au |
| Perihelion – aphelion | 1.99 – 2.81 au |
| Eccentricity | 0.170 |
| Inclination | 9.66° |
| Closest distance between its orbit and Earth's (MOID) | 1.01 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.