Global Information1421 Esperanto information
| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 18 March 1936 |
| Designations | |
MPC designation | (1421) Esperanto |
Named after | Esperanto[1] (artificial language) |
Alternative designations | 1936 FQ · 1931 HC 1958 GD · A906 UD A917 XD · A920 GD |
Minor planet category | main-belt[1][2] · (outer) background[3][4] |
| Orbital characteristics[2] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.92 yr (40,879 d) |
| Aphelion | 3.3505 AU |
| Perihelion | 2.8280 AU |
Semi-major axis | 3.0893 AU |
| Eccentricity | 0.0846 |
Orbital period (sidereal) | 5.43 yr (1,983 d) |
Mean anomaly | 77.705° |
Mean motion | 0° 10m 53.4s / day |
| Inclination | 9.8030° |
Longitude of ascending node | 42.595° |
Argument of perihelion | 163.18° |
| Physical characteristics | |
Mean diameter | 43.31±3.1 km[5] 51.95±10.21 km[6][7] 56.68±0.96 km[8] 62.06±17.35 km[9] 64.37±25.60 km[10] |
Synodic rotation period | 21.982±0.005 h[11] |
Geometric albedo | 0.03[9][10] 0.042[8] 0.0714±0.011[5] 0.098[6][7] |
Spectral type | C (assumed)[12] |
Absolute magnitude (H) | 9.56[7] 10.30[6][8][9] 10.4[1][2] 10.42[10] |
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.[12] It was named for the artificial language Esperanto.[1]
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