14 Irene

**14 Irene**
Discovery
Discoverer	John Russell Hind
Discovery Date	May 19, 1851
Alternate Designations	A906 QC; A913 EA; 1952 TM
Category	Main belt
Orbital Elements Epoch July 14, 2004 (JD 2453200.5)
Eccentricity (e)	0.168
Semi-Major Axis (a)	386.730 Gm (2.585 AU)
Perihelion (q)	321.602 Gm (2.150 AU)
Aphelion (Q)	451.858 Gm (3.020 AU)
Orbital Period (P)	1518.176 d (4.16 a)
Mean Orbital Speed	18.52 km/s
Inclination (i)	9.106°
Longitude of the Ascending Node (Ω)	86.493°
Argument of Perihelion (ω)	96.473°
Mean Anomaly (M)	326.489°
Physical Characteristics
Dimensions	181.8 km ^{[1] (http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT)}
Mass	6.3×10¹⁸ kg
Density	2 ? g/cm³
Surface Gravity	0.051 m/s²
Escape Velocity	0.096 km/s
Rotation Period	0.6275 d ^{[2] (http://www.psi.edu/pds/archive/lc.html)}
Spectral Class	S-type asteroid ^{1 (http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT)}
Absolute Magnitude	6.30
Albedo	0.160 ^{1 (http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT)}
Mean Surface Temperature	~234 K

14 Irene ("eye REE nee") is a very large Main belt asteroid. This stony asteroid contains also metallic iron-nickel.

It was discovered by J. R. Hind on May 19, 1851 and named after Eirene, a personification of peace in Greek mythology, one of the Horae, daughter of Jupiter and Themis. The name was suggested by Sir John Herschel. Hind wrote,

You will readily discover that this name [...] has some relation to this event (the Great Industrial Exhibition) which is now filling our metropolis [London] with the talent of all civilised nations, with those of Peace, the productions of Art and Science, in which all mankind must feel an interest.

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.

The fairly flat lightcurve indicates a spherical object. There have been four reported stellar occultation events by Irene.

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The Minor Planets

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