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14 Irene

From Wikipedia, the free encyclopedia
Main-belt asteroid

14 Irene
A three dimensional model of 14 Irene fromlight curve inversion on the top and images of the asteroid on the bottom.
Discovery
Discovered byJohn Russell Hind
Discovery dateMay 19, 1851
Designations
(14) Irene
Pronunciation/ˈrn/[1]
Named after
Irēnē
A906 QC;
A913 EA;
1952 TM
Main belt
AdjectivesIrenean/rɪˈnən/ (<Irenæan)
SymbolAstronomical symbol of 14 Irene (historical)
Orbital characteristics[2]
Epoch July 14, 2004 (JD 2453200.5)
Aphelion451.858 Gm (3.020 AU)
Perihelion321.602 Gm (2.150 AU)
386.730 Gm (2.585 AU)
Eccentricity0.168
1,518.176 d (4.16 yr)
326.489°
Inclination9.106°
86.493°
96.473°
Physical characteristics
Dimensions(167 × 153 × 139) ± 16 km[3]
152 km (Dunham)[2]
155 ± 6 km[4]
Mass(6.94±1.63)×1018 kg[a][3]
(5.097 ± 0.772/0.941)×1018 kg[4]
3.73±1.47 g/cm3[3]
2.614 ± 0.396/0.483 g/cm3[4]
0.6275 d (15.06 h)[2][5]
0.159[2]
S[2]
8.85[6] to 12.30
6.[2]
0.17 to 0.052"

14 Irene (/ˈrn/) is a largemain-beltasteroid, discovered by the English astronomerJohn Russell Hind on May 19, 1851. It is orbiting theSun at a distance of2.585 AU with aperiod of 4.16 yr and aneccentricity of 0.168. Theorbital plane is tilted at an angle of 9.1° to theplane of the ecliptic.[2]

14 Irene was named afterIrēnē, a personification ofpeace inGreek mythology. She was one of theHorae, daughter ofZeus andThemis. The name was suggested by SirJohn Herschel.[7] Hind wrote,

"You will readily discover that this name [...] has some relation to this event (theGreat 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."

TheGreat Exhibition of the Works of Industry of All Nations inthe Crystal Palace ofHyde 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",[8] but it was hardly drawn before the use of graphical symbols to represent asteroids was dropped entirely.[9] It was included inUnicode 17.0 as U+1CEC7 𜻇 ().[10][11]

Observations from 2007 indicate that the rotation pole of 14 Irene lies close to theplane of the ecliptic, indicating it has anobliquity close to 90°.[12] The fairly flat Irenianlightcurves indicate somewhat spherical proportions.[citation needed] This is a stonyS-type asteroid with amean diameter of around 152 km.[3][2] It is spinning with arotation period of 15 hours.[12]

There have been seven reportedstellaroccultation events by Irene. The best is a threechord event observed in 2013.[13]

See also

[edit]

Notes

[edit]
  1. ^(3.49 ± 0.82) × 10−12M

References

[edit]
  1. ^Noah Webster (1884)A Practical Dictionary of the English Language
  2. ^abcdefgh"JPL Small-Body Database Browser: 14 Irene" (2008-04-14 last obs). Retrieved27 November 2008.
  3. ^abcdBaer, James; Chesley, Steven; Matson, Robert (2011)."Astrometric masses of 26 asteroids and observations on asteroid porosity".The Astronomical Journal.141 (5).Bibcode:2011AJ....141..143B.doi:10.1088/0004-6256/141/5/143.
  4. ^abcFienga, A.; Avdellidou, C.; Hanuš, J. (February 2020)."Asteroid masses obtained with INPOP planetary ephemerides".Monthly Notices of the Royal Astronomical Society.492 (1).doi:10.1093/mnras/stz3407.
  5. ^"Asteroid Lightcurve Parameters". Planetary Science Institute. Archived fromthe original on 14 June 2006. Retrieved3 November 2008.
  6. ^"AstDys (14) Irene Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved26 June 2010.
  7. ^Schmadel, Lutz D. (2003).Dictionary of minor planet names. Vol. 1 (5th ed.). Berlin Heidelberg New York:Springer-Verlag. p. 16.ISBN 3-540-00238-3.
  8. ^Hind, John Russell (1852)."From a Letter of Mr. Hind to the Editor".Astronomical Journal.2:22–23.Bibcode:1851AJ......2...22H.doi:10.1086/100162.
  9. ^When did the asteroids become minor planets?Archived 2007-09-21 at theWayback Machine
  10. ^Bala, Gavin Jared; Miller, Kirk (18 September 2023)."Unicode request for historical asteroid symbols"(PDF).unicode.org. Unicode. Retrieved26 September 2023.
  11. ^"Miscellaneous Symbols Supplement"(PDF).unicode.org. The Unicode Consortium. 2025. Retrieved9 September 2025.{{cite web}}: CS1 maint: url-status (link)
  12. ^abPilcher, Frederick (October 2009). "New Lightcurves of 8 Flora, 13 Egeria, 14 Irene, 25 Phocaea 40 Harmonia, 74 Galatea, and 122 Gerda".Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers.36 (4):133–136.Bibcode:2009MPBu...36..133P.
  13. ^"Asteroid Data Sets".sbn.psi.edu. Retrieved19 May 2018.

External links

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