(15) Eunòmia

Aquest article tracta sobre asteroide. Vegeu-ne altres significats a «Eunòmia (Hores)».
Infotaula objecte astronòmic(15) Eunòmia 
Designació provisionalA851 OA Modifica el valor a Wikidata
Tipusasteroide Modifica el valor a Wikidata
Grup de planetes menorscinturó d'asteroides Modifica el valor a Wikidata
Tipus espectral (asteroide)Asteroide de tipus S[1] Modifica el valor a Wikidata
Descobert perAnnibale de Gasparis[2] Modifica el valor a Wikidata
Data de descobriment29 juliol 1851[1] Modifica el valor a Wikidata, Observatori Astronòmic de Capodimonte[2] Modifica el valor a Wikidata
EpònimEunòmia[3] Modifica el valor a Wikidata
Cos pareSol Modifica el valor a Wikidata
Època14 de juny de 2006 (DJ 2453900,5)
Dades orbitals
 Vegeu-ne la posició actual
Apoàpside3,13992 ua[4] Modifica el valor a Wikidata
Periàpside2,14799 ua
(arg (ω): 98,76876)[4] Modifica el valor a Wikidata
Semieix major a2,64395 ua[4] Modifica el valor a Wikidata
Excentricitat e0,18758[4] Modifica el valor a Wikidata
Període orbital P1.570,29 d[4] Modifica el valor a Wikidata
Velocitat orbital mitjana18,16 km/s
Anomalia mitjana M21,74829 °[4] Modifica el valor a Wikidata
Inclinació i11,738 °
11,75582 °[4] Modifica el valor a Wikidata
Longitud del node ascendent Ω292,88875 °[4] Modifica el valor a Wikidata
Característiques físiques i astromètriques
Diàmetre255,33 km
231,689 km[1] Modifica el valor a Wikidata
Magnitud absoluta5,41[1] Modifica el valor a Wikidata
Massa3,341019 kg[6] Modifica el valor a Wikidata
Densitat mitjana3,85 g/cm³ Modifica el valor a Wikidata
Periode de rotació6,083 h[1] Modifica el valor a Wikidata
Rotació sideral0,2535 d (6,083 h)[5]
Gravetat superficial equatorial0,137 m/s² Modifica el valor a Wikidata
Velocitat d'escapament0,16 km/s
Albedo0,209 (albedo geomètrica)
0,248 (albedo geomètrica)[1] Modifica el valor a Wikidata
Catàlegs astronòmics
Identificador JPL20000015 Modifica el valor a Wikidata
Sèrie
« (14) Irene Modifica el valor a Wikidata • (16) Psique Modifica el valor a Wikidata »

(15) Eunòmia és un asteroide que fa el nombre 15 de la sèrie. Va ser descobert per l'astrònom italià Annibale de Gasparis (1819-92) des de Nàpols el 29 de juliol de 1851. Va ser batejat en honor d'Eunòmia, deessa grega de la llei i la legislació.

Aquest asteroide forma una petita família en la regió central del cinturó principal d'asteroides. La família d'Eunòmia dista del Sol entre 2,5 i 2,8 ua i els seus membres tenen una inclinació mitjana de 12°. Eunòmia és de la classe S amb un diàmetre d'uns 100 km. (85) Io i (141) Lumen pertanyen a aquesta família.

Referències

A Wikimedia Commons hi ha contingut multimèdia relatiu a: (15) Eunòmia
  1. ↑ 1,0 1,1 1,2 1,3 1,4 1,5 «JPL Small-Body Database». [Consulta: 16 octubre 2023].
  2. ↑ 2,0 2,1 «JPL Small-Body Database». [Consulta: 23 gener 2024].
  3. ↑ Afirmat a: Dictionary of Minor Planet Names (sisena edició revisada i ampliada). Pàgina: 14. Editorial: Springer Science+Business Media. Llengua del terme, de l'obra o del nom: anglès.
  4. ↑ 4,0 4,1 4,2 4,3 4,4 4,5 4,6 4,7 «JPL Small-Body Database». [Consulta: 3 novembre 2024].
  5. ↑ Planetary Data System (PDS) lightcurve data Arxivat 2006-06-14 a Wayback Machine. (anglès)
  6. ↑ URL de la referència: http://www.springerlink.com/content/h747307j43863228/fulltext.pdf. Arxiu de l'URL: https://web.archive.org/web/20110224014158/http://www.springerlink.com/content/h747307j43863228/fulltext.pdf. Data d'arxivament: 24 febrer 2011.

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