(21045) Juangabriel Main-belt Asteroid
Discovered on 18 September 1990 by H. E. Holt at Palomar.
Juan Carlos Gabriel (b. 1956) is an Argentinean-German high-energy physicist who has been engaged with COSPAR’s Panel on Capacity Building activities for 25 years as lecturer, Vice-Chair, and then Chair. Under his outstanding leadership, the Panel became one of COSPAR’s most visible and successful flagship programs, covering numerous scientific areas.Naming citation (WGSBN Bull. 6, #13, 5), IAU / Minor Planet Center, via NASA/JPL
Where Juangabriel is today
Seen from above the solar system on 2026-10-14: Juangabriel is 2.86 au from the Sun and 3.11 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21045 |
| Provisional designation | 1990 SQ1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.15 km (#6,432 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0430 |
| Rotation period | 10.1 hours |
| Absolute magnitude (H) | 14.11 |
| Orbital period | 4.37 years |
| Semi-major axis | 2.67 au |
| Perihelion – aphelion | 2.15 – 3.19 au |
| Eccentricity | 0.195 |
| Inclination | 11.7° |
| Closest distance between its orbit and Earth's (MOID) | 1.15 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Juan
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