14 Irene

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14 Irene
Discovery
Discovered by John Russell Hind
Discovery time May 19, 1851
Names
Other names A906 QC;
A913 EA;
1952 TM
Group Main belt
Orbit
Reference date July 14, 2004 (JD 2453200.5)
Longest distance from the Sun 451.858 Gm (3.020 AU)
Shortest distance from the Sun 321.602 Gm (2.150 AU)
Longest distance from the center of its orbital path
("semi-major axis")
386.730 Gm (2.585 AU)
How egg-shaped its orbit is
("eccentricity")
0.168
How long it takes to complete an orbit 1518.176 d (4.16 a)
Average speed 18.52 km/s
Mean anomaly 326.489°
Angle above the reference plane
("inclination")
9.106°
Longitude of where it comes up through the reference plane 86.493°
Angle between its shortest distance from what it orbits around and where it comes up through the reference plane
("argument of periapsis")
96.473°
Size and Other Qualities
Measures 181.8 km [1]
Mass 6.3×1018 kg [reference needed]
Average density 2 ? g/cm³
Gravity at its surface 0.051 m/s²
Slowest speed able to escape into space
("escape velocity")
0.096 km/s
How long it takes to turn around one time 0.6275 d[2]
How much light it reflects 0.160[1]
Avg. surface temp. ~170 K
Light-band group
("spectral type")
S-type asteroid [1]
Seeming brightness
("apparent magnitude")
8.84 to 12.25
True brightness
("absolute magnitude")
6.30
Seeming size
("angular diameter")
0.17" to 0.052"

14 Irene is a very big Main belt asteroid.

14 Irene was found 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",[3] but an actual drawing of the symbol was never made before the use of graphical symbols to represent asteroids was no longer used.[4]

There have been four reported stellar occultations by Irene.

References[change | edit source]

  1. 1.0 1.1 1.2 http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT Archived 16 January 2010 at WebCite
  2. http://www.psi.edu/pds/archive/lc.html Archive copy at the Internet Archive
  3. Hind, John Russell (1852). "From a Letter of Mr. Hind to the Editor". Astron. J. 2: 22-23.
  4. When did the asteroids become minor planets? Archived 18 January 2010 at WebCite

Other websites[change | edit source]