622 Esther
622 Esther is a minor planet orbiting the Sun.
| Discovery | |
|---|---|
| Discovered by | Joel Hastings Metcalf |
| Discovery site | Taunton, Massachusetts |
| Discovery date | 13 November 1906 |
| Designations | |
MPC designation | (622) Esther |
Named after | Esther (biblical figure) |
Alternative designations | 1906 WP |
Minor planet category | main-belt · (inner) |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 109.40 yr (39959 d) |
| Aphelion | 2.9999 AU (448.78 Gm) |
| Perihelion | 1.8313 AU (273.96 Gm) |
Semi-major axis | 2.4156 AU (361.37 Gm) |
| Eccentricity | 0.24189 |
Orbital period (sidereal) | 3.75 yr (1371.3 d) |
Mean anomaly | 93.681° |
Mean motion | 0° 15m 45.072s / day |
| Inclination | 8.6435° |
Longitude of ascending node | 142.046° |
| 256.687° | |
| Earth MOID | 0.859795 AU (128.6235 Gm) |
| Jupiter MOID | 2.48023 AU (371.037 Gm) |
| TJupiter | 3.461 |
| Physical characteristics | |
| Dimensions | 40 × 24 × 24 km ± 26% 29±8 km |
Sidereal rotation period | 47.5 h (1.98 d) |
| S-type asteroid | |
| 10.3 | |
The asteroid is named after the biblical figure Esther.
In 2001, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.11 AU. The resulting data yielded an effective diameter of 29 ± 8 km.
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