14 Irene
A three dimensional model of 14 Irene from light curve inversion on the top and images of the asteroid on the bottom. | |
| Discovery | |
|---|---|
| Discovered by | John Russell Hind |
| Discovery site | George Bishop's Observatory |
| Discovery date | 20 May 1851 |
| Designations | |
| (14) Irene | |
| Pronunciation | /aɪˈriːniː/ |
Named after | Irēnē |
| A906 QC; A913 EA; 1952 TM | |
| Main belt | |
| Adjectives | Irenean /aɪrɪˈniːən/ (< Irenæan) |
| Symbol | (historical) |
| Orbital characteristics | |
| Epoch 21 November 2025 (JD 2461000.5) | |
| Aphelion | 3.009 AU |
| Perihelion | 2.167 AU |
| 2.588 AU | |
| Eccentricity | 0.163 |
| 4.163 yr (1520.59 d) | |
| 12.926° | |
| Inclination | 9.130° |
| 86.010° | |
| 98.265° | |
| Jupiter MOID | 2.016 AU |
| TJupiter | 3.385 |
| Physical characteristics | |
| Dimensions | (167 × 153 × 139) ± 16 km |
| 152 km (Dunham) 155 ± 6 km | |
| Mass | (6.94±1.63)×1018 kg (5.097 ± 0.772/0.941)×1018 kg |
Mean density | 3.73±1.47 g/cm3 2.614 ± 0.396/0.483 g/cm3 |
| 0.6275 d (15.06 h) | |
| 0.159 | |
| S | |
| 8.85 to 12.30 | |
| 6. | |
| 0.17″ to 0.052" | |
14 Irene (/aɪˈriːniː/) is a large main-belt asteroid, discovered by the English astronomer John Russell Hind on 20 May 1851. It is orbiting the Sun at a distance of 2.585 AU with a period of 4.16 yr and an eccentricity of 0.168. The orbital plane is tilted at an angle of 9.1° to the plane of the ecliptic.
Observations from 2007 indicate that the rotation pole of 14 Irene lies close to the plane of the ecliptic, indicating it has an obliquity close to 90°. The fairly flat Irenian lightcurves indicate somewhat spherical proportions. This is a stony S-type asteroid with a mean diameter of around 152 km. It is spinning with a rotation period of 15 hours.
There have been seven reported stellar occultation events by Irene. The best is a three chord event observed in 2013.