(10216) Popastro Main-belt Asteroid
Discovered on 22 September 1997 by S. P. Laurie at Church Stretton.
The U.K. Society for Popular Astronomy (SPA) celebrates its fiftieth anniversary in 2003. It was established as the Junior Astronomical Society to promote astronomy as a hobby, particularly among beginners. The SPA is one of three national societies for astronomy in the U.K.Naming citation (20020328/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Popastro is today
Seen from above the solar system on 2026-10-14: Popastro is 2.62 au from the Sun and 3.40 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10216 |
| Provisional designation | 1997 SN3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.85 km (#9,148 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.205 |
| Absolute magnitude (H) | 13.68 |
| Orbital period | 4.58 years |
| Semi-major axis | 2.76 au |
| Perihelion – aphelion | 2.37 – 3.15 au |
| Eccentricity | 0.142 |
| Inclination | 5.71° |
| Closest distance between its orbit and Earth's (MOID) | 1.39 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.