Key facts
- Discovered by
- Y. Väisälä
- Discovery site
- Turku Obs.
- Discovery date
- 18 March 1936
- Named after
- Esperanto , (artificial language)
- Alternative designations
- 1936 FQ · 1931 HC, 1958 GD · A906 UD, A917 XD · A920 GD
- Minor planet category
- main-belt · ( outer ) , background
- Observation arc
- 111.92 yr (40,879 d)
- Aphelion
- 3.3505 AU
- Perihelion
- 2.8280 AU
- Semi major axis
- 3.0893 AU
- Orbital period sidereal
- 5.43 yr (1,983 d)
- Mean anomaly
- 77.705 °
- Mean motion
- 0° 10 53.4 / day
- Inclination
- 9.8030°
- Longitude of ascending node
- 42.595°
- Argument of perihelion
- 163.18°
- Mean diameter
- 43.31 ± 3.1 km , 51.95 ± 10.21 km , 56.68 ± 0.96 km , 62.06 ± 17.35 km , 64.37 ± 25.60 km
- Synodic rotation period
- 21.982 ± 0.005 h
via Wikipedia infobox
~3 min read
Encyclopedic overview
1421 Esperanto, provisional designation 1936 FQ, is a dark background asteroid from the outer regions of the asteroid belt, approximately 55 kilometers (34 miles) in diameter. It was discovered on 18 March 1936, by Finnish astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory in Turku, southwest Finland. The presumed C-type asteroid has a rotation period of nearly 22 hours. It was named for the artificial language Esperanto.
Orbit and classification
Excerpted from Wikipedia’s “Q139003” article, available under the CC BY-SA 4.0 licence.