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
Wikidata facts
- Instance of
- asteroid
- Named after
- Esperanto
- Followed by
- 1422 Strömgrenia
- Follows
- 1420 Radcliffe
- Parent body
- Sun
- Minor-planet group
- asteroid belt
- Diameter
- 43.31
- Orbital period
- 1982.659205477228
Show 18 more facts
- orbital inclination
- 9.801011091589121
- discoverer or inventor
- Yrjö Väisälä
- site of astronomical discovery
- Iso-Heikkilä Observatory
- provisional designation
- A920 GD
- time of discovery or invention
- 1936-03-18
- orbital eccentricity
- 0.08448790153624064
- Commons category
- 1421 Esperanto
- absolute magnitude
- 10.63
- periapsis
- 2.827681673508694
- apoapsis
- 3.349586061682525
- semi-major axis of an orbit
- 3.08863386759561
- mean anomaly
- 155.0294105524272
- longitude of ascending node
- 42.54767649186418
- argument of periapsis
- 161.5619884223944
- albedo
- 0.0714
- rotation period
- 21.982
- time of periapsis
- 2460146.6930890237
- epoch
- November 21, 2025
Sources (2)
via Wikidata · CC0
~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 “1421 Esperanto” article, available under the CC BY-SA 4.0 licence.