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Ross 128

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Ross 128 (Gliese 447) on punainen kääpiötähti, jonka etäisyys on 11,007 valovuotta. Siten se on yksi Aurinkoa lähimmistä tähdistä. Ross 128 on muuttuva flare-tähti, mutta ei niin aktiivinen kuin nuoremmat flare-tähdet[1]

Ross 128:lta on löydetty eksoplaneetta.[2]

Näennäinen kirkkaus mV 13.53. Spektrityyppi M 4V [3] Absoluuttinen kirkkaus 13,5.[4]

Planeetta on havaittu spektroskoopilla säteisnopeusmenetelmällä.

Ross 128 b[5]

Massa m sini = 1.35 M, 1%:lla yli 4 Maan massaa.[2]

Kiertoaika 9,9 päivää[6]

Etäisyys keskustähdestä 0,0496 AU

Eksentrisyys 0,12[7]

  1. Ross 128 www.solstation.com. Viitattu 7.7.2020.
  2. a b Rocky Ross 128 b might harbour aliens – and it's headed right for us www.theregister.com. Viitattu 7.7.2020. (englanniksi)
  3. THE 100 NEAREST STAR SYSTEMS www.recons.org. Viitattu 7.7.2020.
  4. Ross 128 b www.exoplanetkyoto.org. Viitattu 7.7.2020.
  5. X. Bonfils, N. Astudillo-Defru, R. Díaz, J.-M. Almenara, T. Forveille, F. Bouchy: A temperate exo-Earth around a quiet M dwarf at 3.4 parsec,. Astronomy & Astrophysics, 1.5.2018, nro 613, s. A25. doi:10.1051/0004-6361/201731973. ISSN 0004-6361. Artikkelin verkkoversio. en
  6. Open Exoplanet Catalogue - Ross 128 b www.openexoplanetcatalogue.com. Viitattu 7.7.2020.
  7. Exoplanet-catalog Exoplanet Exploration: Planets Beyond our Solar System. Viitattu 7.7.2020.

Aiheesta muualla

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Ross 128
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