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1421 Esperanto

1421 Esperanto
Discovery 
Discovered by Y. Väisälä
Discovery site Turku Observatory
Discovery date 18 March 1936
Designations
MPC designation (1421) Esperanto
Named after
Esperanto
1936 FQ · 1931 HC
1958 GD · A906 UD
A917 XD · A920 GD
main-belt
Orbital characteristics
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 109.40 yr (39957 days)
Aphelion 3.3462 AU (500.58 Gm)
Perihelion 2.8307 AU (423.47 Gm)
3.0885 AU (462.03 Gm)
Eccentricity 0.083465
5.43 yr (1982.5 d)
255.02°
0° 10m 53.724s / day
Inclination 9.8097°
42.622°
164.48°
Earth MOID 1.8263 AU (273.21 Gm)
Jupiter MOID 1.61867 AU (242.150 Gm)
Jupiter Tisserand parameter 3.198
Physical characteristics
Dimensions 43.3 km
Mean radius
21.655±1.55 km
21.982 h (0.9159 d)
0.0714±0.011
10.4

1421 Esperanto, provisional designation 1936 FQ, is an asteroid from the asteroid belt, about 43 kilometers in diameter. It was discovered on March 18, 1936, by the Finnish astronomer Yrjö Väisälä at Iso-Heikkilä Observatory in Turku, Finland. The asteroid orbits the Sun at a distance of 2.8–3.3 AU once every five and a half years. It rotational period has been measured to take almost 22 hours. It has a relatively low albedo of 0.07.

Yrjö Väisälä named the asteroid after the artificial language, Esperanto, which was created by inventor and writer, Ludwik Lejzer Zamenhof (1859–1917), who used the pseudonym "Doktoro Esperanto". The discoverer also named another asteroid, 1462 Zamenhof, directly after the inventor. Both asteroids are considered to be the most remote Zamenhof-Esperanto objects.



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