(240021) Radzo Main-belt Asteroid
Discovered on 8 October 2001 by NEAT at Palomar.
Jozef Radzo (b. 1949) is a teacher of mathematics and physics at Gymnázium A. Bernoláka secondary school in Senec, Slovakia, where he established modern physics and chemistry laboratories. From 1973-1993, he worked in Gymnázium Šamorín, where he encouraged S. Kürti's interest in astronomy.Naming citation (MPC batch dated 2018-10-26), IAU / Minor Planet Center, via NASA/JPL
Where Radzo is today
Seen from above the solar system on 2026-10-14: Radzo is 3.41 au from the Sun and 4.35 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 240021 |
| Provisional designation | 2001 TX257 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.80 km (#7,878 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0290 |
| Absolute magnitude (H) | 15.62 |
| Orbital period | 5.60 years |
| Semi-major axis | 3.15 au |
| Perihelion – aphelion | 2.90 – 3.41 au |
| Eccentricity | 0.0807 |
| Inclination | 11.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.91 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Jozef
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