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Discovery
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| Discovered by | John Russell Hind |
| Discovery date | May 19, 1851 |
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Designations
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| Named after | Eirene |
| Alternate name(s) | A906 QC; A913 EA; 1952 TM |
| Minor planet category |
Main belt |
| Epoch July 14, 2004 (JD 2453200.5) | |
| Aphelion | 451.858 Gm (3.020 AU) |
| Perihelion | 321.602 Gm (2.150 AU) |
| Semi-major axis | 386.730 Gm (2.585 AU) |
| Eccentricity | 0.168 |
| Orbital period | 1518.176 d (4.16 a) |
| Average orbital speed | 18.52 km/s |
| Mean anomaly | 326.489° |
| Inclination | 9.106° |
| Longitude of ascending node | 86.493° |
| Argument of perihelion | 96.473° |
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Physical characteristics
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| Dimensions | 167x153x139km[2] (152km)[1] |
| Mass | 8.2×1018 kg[2] |
| Mean density | 4.42±1.59 g/cm³[2] |
| Equatorial surface gravity | 0.051 m/s² |
| Escape velocity | 0.096 km/s |
| Rotation period | 0.6275 d (15.06 h)[1][3] |
| Albedo | 0.159[1] |
| Temperature | ~170 K |
| Spectral type | S-type asteroid[1] |
| Apparent magnitude | 8.85[4] to 12.30 |
| Absolute magnitude (H) | 6.30[1] |
| Angular diameter | 0.17" to 0.052" |
14 Irene ( /aɪˈriːniː/ eye-ree-nee; Greek: Ειρήνη) is a very large main-belt asteroid.
14 Irene was discovered by J. R. Hind on May 19, 1851, and named after Eirene, a personification of peace in Greek mythology. She was one of the Horae, daughter of Zeus and Themis. The name was suggested by Sir John Herschel.[5] Hind wrote,
The Great Exhibition of the Works of Industry of All Nations in the Crystal Palace of Hyde Park, London, ran from May 1 until October 18, 1851.
Hind suggested that the symbol for the asteroid should be "A dove carrying an olive-branch, with a star on its head",[6] but an actual drawing of the symbol was never made before the use of graphical symbols to represent asteroids was dropped entirely.[7]
The fairly flat Irenian lightcurves indicate somewhat spherical proportions. There have been four reported stellar occultation events by Irene.
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