(7472) Kumakiri

Infotaula objecte astronòmic(7472) Kumakiri
Designació provisional1969 VC2, 1990 WG3, 1992 CU Modifica el valor a Wikidata
Tipusasteroide Modifica el valor a Wikidata
Grup de planetes menorscinturó d'asteroides Modifica el valor a Wikidata
Descobert perMakio Akiyama[1]
Toshimasa Furuta[1] Modifica el valor a Wikidata
Data de descobriment13 febrer 1992[2] Modifica el valor a Wikidata, Susono i Mishima[3] Modifica el valor a Wikidata
Cos pareSol Modifica el valor a Wikidata
Època13 de setembre de 2023 Modifica el valor a Wikidata
Dades orbitals
 Vegeu-ne la posició actual
Apoàpside3,326 ua[4]
3,33909 ua[3] Modifica el valor a Wikidata
Periàpside2,69706 ua
(arg (ω): 82,36883)[4]
2,67981 ua
(arg (ω): 82,36883)[3] Modifica el valor a Wikidata
Semieix major a3,01136 ua[4] i 3,00945 ua[3] Modifica el valor a Wikidata
Excentricitat e0,10398
0,10437[4]
0,10954[3] Modifica el valor a Wikidata
Període orbital P5,23 a[4] i 1.906,91 d[3] Modifica el valor a Wikidata
Anomalia mitjana M348,71219 °[4]
5,98337 °[3] Modifica el valor a Wikidata
Inclinació i9,92369 °[4]
9,91531 °[3] Modifica el valor a Wikidata
Longitud del node ascendent Ω83,45196 °[4] i 83,3643 °[3] Modifica el valor a Wikidata
Característiques físiques i astromètriques
Diàmetre10,008 km[2] Modifica el valor a Wikidata
Magnitud absoluta11,9
12,2[4]
12,47[3] Modifica el valor a Wikidata
Albedo0,279 (albedo geomètrica)[2] Modifica el valor a Wikidata
Catàlegs astronòmics
Identificador JPL20007472 Modifica el valor a Wikidata
Sèrie
« (7471) 1991 YD Modifica el valor a Wikidata • (7473) 1992 EC4 Modifica el valor a Wikidata »

L'asteroide (7472) Kumakiri és un dels situats al Cinturó principal descobert el 1992 per Makio Akiyama i Toshimasa Furuta.

Recentment ha estat notícia pel seu contingut basàltic juntament amb (10537) 1991 RY16 per un estudi conduït per René Duffard i Fernando Roig[5][6] basat en dades del Sloan Digital Sky Survey.

El basalt és evidència que un objecte ha estat prou gran en el passat per mantenir escalfor interna.[7]

Fins fa poc es creia que els asteroides que contenien basalt eren fragments de l'asteroide (4) Vesta. El 2001 es va descobrir (1459) Magnya amb un basalt de composició química lleugerament diferent al de Vesta suggerint que no pertanyia a la mateixa família.

La manca de basalt i olivina, que constituirien la crosta i el mantell dels objectes de la mida de Vesta en el Cinturó, ha intrigat els científics molt de temps. La teoria prediu que la meitat dels asteroides haurien d'estar formats d'un d'aquests dos materials.

>>Trobar-n'hi un és significatiu, diu Michael Gaffey[7] (geóleg), perquè se n'esperava trobar en molts més asteroides.

Una possibilitat, segons Gaffey, és que l'objecte pare de Kumakiri i (10537) 1991 RY16, s'hagi esmicolat a causa de repetides col·lisions.

Referències

  1. ↑ 1,0 1,1 Afirmat a: Minor Planet Center Database.
  2. ↑ 2,0 2,1 2,2 «JPL Small-Body Database». [Consulta: 20 novembre 2023].
  3. ↑ 3,00 3,01 3,02 3,03 3,04 3,05 3,06 3,07 3,08 3,09 «JPL Small-Body Database». [Consulta: 4 febrer 2024].
  4. ↑ 4,0 4,1 4,2 4,3 4,4 4,5 4,6 4,7 4,8 URL de la referència: https://www.minorplanetcenter.net/db_search/show_object?object_id=7472.
  5. ↑ Dos nous asteroides basàltics al cinturó principal extern (anglès)
  6. ↑ Dos nous objectes basàltics al cituró principal extern (anglès)
  7. ↑ 7,0 7,1 Space.com - Científics frapats per estranys asteroides (anglès)

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