14 Irene

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=14 Irene
discoverer=John Russell Hind
discovered=May 19, 1851
alt_names=A906 QC; A913 EA; 1952 TM
mp_category=Main belt
epoch=July 14, 2004 (JD 2453200.5)
semimajor=386.730 Gm (2.585 AU)
perihelion=321.602 Gm (2.150 AU)
aphelion=451.858 Gm (3.020 AU)
eccentricity=0.168
period=1518.176 d (4.16 a)
inclination=9.106°
arg_peri=96.473°
asc_node=86.493°
mean_anomaly=326.489°
avg_speed=18.52 km/s
dimensions=181.8 km http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT]
mass=6.3×10¹⁸ kg Fact|date=April 2008
density=2 ? g/cm³
surface_grav=0.051 m/s²
escape_velocity=0.096 km/s
rotation=0.6275 d [ [http://www.psi.edu/pds/archive/lc.html] Dead link|date=March 2008]
spectral_type=S-type asteroid
magnitude = 8.84 to 12.25
abs_magnitude=6.30
albedo=0.160
angular_size = 0.17" to 0.052"
single_temperature=~170 K

14 Irene (pronEng|aɪˈriːni respell|eye|REE|nee, _gr. "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. 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.

Hind suggested that the symbol for the asteroid should be "A dove carrying an olive-branch, with a star on its head", [cite journal| last=Hind| first=John Russell| year=1852| title=From a Letter of Mr. Hind to the Editor| journal=Astron. J.| volume= 2| pages= 22–23| doi=10.1086/100162] but an actual drawing of the symbol was never made before the use of graphical symbols to represent asteroids was dropped entirely. [ [http://aa.usno.navy.mil/faq/docs/minorplanets.php When did the asteroids become minor planets? ] ]

The fairly flat Irenian lightcurves indicate somewhat spherical proportions. There have been four reported stellar occultation events by Irene.

References

* Gould, B.A., " [http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1851AJ......2...22G&db_key=AST&data_type=HTML&format=&high=42c888df4622018 New planet] ", Astronomical Journal, Vol. 2, iss. 27, p. 22, June 1851

External links

* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=14;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=14 Ephemeris]