1421 Esperanto
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Observatory |
| Discovery date | 18 March 1936 |
| Designations | |
| MPC designation | 1421 Esperanto |
Named after | Esperanto[2] |
|
1936 FQ · 1931 HC 1958 GD · A906 UD A917 XD · A920 GD | |
| main-belt | |
| Orbital characteristics [1] | |
| 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.[1]
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".[2] The discoverer also named another asteroid, 1462 Zamenhof, directly after the inventor. Both asteroids are considered to be the most remote Zamenhof-Esperanto objects.
References
- 1 2 3 "JPL Small-Body Database Browser: 1421 Esperanto (1936 FQ)" (2015-09-12 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1421) Esperanto. Springer Berlin Heidelberg. p. 114. ISBN 978-3-540-29925-7. Retrieved 22 August 2016.
External links
- Dictionary of Minor Planet Names, Google books
- 1421 Esperanto at the JPL Small-Body Database
