(37939) Hasler Main-belt Asteroid
Discovered on 16 April 1998 by L. Sarounova at Ondrejov.
Czech song writer, actor, movie director and cabaret performer Karel Hašler (1879–1941) was enormously loved by all Czechs for his popular hits that became standards of the century.Naming citation (WGSBN Bull. 4, #10, 7), IAU / Minor Planet Center, via NASA/JPL
Where Hasler is today
Seen from above the solar system on 2026-10-14: Hasler is 2.39 au from the Sun and 3.28 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 37939 |
| Provisional designation | 1998 HA |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.69 km (#15,880 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.185 |
| Absolute magnitude (H) | 15.04 |
| Orbital period | 4.13 years |
| Semi-major axis | 2.57 au |
| Perihelion – aphelion | 2.35 – 2.80 au |
| Eccentricity | 0.0886 |
| Inclination | 15.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.34 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.