K
Classificação estelar

K
Temperatura efetiva
3,500–5,000 K
Raio solar
0.7–0.96 R☉
Massa solar
0.45–0.8 M☉

Uma estrela anã laranja é uma estrela que tem classe espectral K e luminosidade V. Sua expectativa de vida está entre 15 a 30 bilhões de anos (comparando o Sol, com 10 bilhões de anos). Está entre classes espectrais G (como o Sol) e M (como Próxima Centauri). Com massa 0,5 e 0,8 a massa do Sol e temperatura superficial entre 3.900 e 5.200 K. Essas estrelas da classe espectral K correspondem a 12,1% das estrelas próximas do Sol,e têm zonas habitáveis (regiões onde água líquida pode existir em planetas) bem mais seguras (tanto quanto a do Sol) que aquelas que se apresentam nas estrelas anãs-vermelhas menores, pois as anãs-vermelhas são mais instáveis quando jovens, produzindo mais tempestades estelares que poderiam destruir qualquer tipo de vida. Exemplos de anãs laranjas: 61 Cygni, Alfa Centauri B e Epsilon Indi.

Uses material from the Wikipedia article "Anã laranja", which is released under the Creative Commons BY-SA 3.0.
Corpo celeste DistânciaWiki
14 HerculisStar, Double or multiple star, Infra-Red source, High proper-motion StarK58[x]
36 OphiuchiStar, Double or multiple star, Infra-Red sourceK19[x]
54 PisciumStar, Infra-Red source, High proper-motion Star, Rotationally variable Star, Variable Star, X-ray sourceK36[x]
6 DraconisStar, Infra-Red sourceK602[x]
61 CygniStar, Double or multiple star, Infra-Red source, X-ray sourceK11[x]
70 OphiuchiStar, Double or multiple star, Variable of BY Dra type, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission source, Variable Star, X-ray sourceK16[x]
98 AquariiStar, Infra-Red source, UV-emission sourceK164[x]
A BootisStar, Infra-Red source, Estrela binária, UV-emission sourceK234[x]
AB PictorisStar, Variable of BY Dra type, Infra-Red source, Pre-main sequence Star, UV-emission source, Variable Star, X-ray sourceK150[x]
AlbireoStar, Double or multiple star, Star in double system, Infra-Red source, Variable StarK435[x]
AldebaranStar, Double or multiple star, Infra-Red source, Long Period Variable, High proper-motion Star, UV-emission source, Variable StarK67[x]
AlgiebaStar, Double or multiple star, Infra-Red sourceK130[x]
Alpha AntliaeStar, Infra-Red source, Variable StarK366[x]
Alpha HorologiiStar, Infra-Red source, High proper-motion Star, UV-emission sourceK115[x]
Alpha IndiStar, Double or multiple star, Infra-Red source, UV-emission sourceK98[x]
Alpha ScutiStar, Infra-Red source, High proper-motion Star, UV-emission source, Variable StarK199[x]
Alpha TucanaeStar, Double or multiple star, Infra-Red source, Estrela binária, UV-emission sourceK200[x]
Alpha VolantisStar, Double or multiple star, Infra-Red source, UV-emission source125[x]
AlphardStar, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source, Variable StarK180[x]
AlsciaukatStar, Infra-Red source, Semi-regular pulsating Star, Variable StarK382[x]
AngetenarStar, Double or multiple star, Infra-Red source, UV-emission source, X-ray sourceK187[x]
AnkaaStar, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission sourceK85[x]
ArcturusStar, Infra-Red source, High proper-motion Star, Gigante vermelha, UV-emission source, Variable StarK37[x]
Asellus AustralisStar, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission sourceK131[x]
AzhaStar, Infra-Red source, High proper-motion Star, UV-emission source, Variable StarK136[x]
b CapricorniStar, Infra-Red source, UV-emission sourceK171[x]
B CentauriStar, Infra-Red sourceK433[x]
Baten KaitosStar, Double or multiple star, Infra-Red source, Estrela binária, UV-emission source, Variable StarK235[x]
BD+14 4559Star, Infra-Red source, High proper-motion StarK158[x]
BD+75 58Star, Infra-Red sourceK55[x]
Beta ReticuliStar, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission sourceK100[x]
Beta VolantisStar, Infra-Red source, Variable StarK108[x]
BoteinStar, Infra-Red source, High proper-motion Star, UV-emission source, Variable StarK169[x]
BundaStar, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission sourceK73[x]
BY DraconisStar, Double or multiple star, Variable of BY Dra type, Estrela eruptiva, Infra-Red source, High proper-motion Star, Radio-source, Estrela binária, UV-emission source, Variable Star, X-ray sourceK53[x]
CebalraiStar, Infra-Red source, High proper-motion Star, UV-emission source, Variable StarK82[x]
CO CamelopardalisStar, Ellipsoidal variable Star, Infra-Red source, Estrela binária, UV-emission source, Variable Star, X-ray source109[x]
D CentauriStar, Double or multiple star, Infra-Red sourceK572[x]
Delta AndromedaeStar, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission source, Variable StarK105[x]
Delta AurigaeStar, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission sourceK141[x]
Delta LeporisStar, Infra-Red source, High proper-motion Star, UV-emission sourceK113[x]
Delta MuscaeStar, Infra-Red source, High proper-motion Star, Estrela bináriaK90[x]
Delta NormaeStar, Infra-Red source, UV-emission source123[x]
Delta OctantisStar, Infra-Red source, High proper-motion Star, Variable StarK299[x]
Deneb AlgediStar, Double or multiple star, Eclipsing binary of Algol type (detached), Infra-Red source, High proper-motion Star, Estrela binária, UV-emission source, Variable Star, X-ray source39[x]
DiphdaStar, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star, X-ray sourceK96[x]
e CentauriStar, Infra-Red sourceK294[x]
EnifStar, Double or multiple star, Infra-Red source, Long-period variable star, Estrela peculiar, UV-emission source, Variable StarK690[x]
Epsilon CirciniStar, Infra-Red sourceK408[x]
Epsilon CrucisStar, Infra-Red source, High proper-motion Star, Variable StarK230[x]
Epsilon CygniStar, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission sourceK72[x]
Epsilon EridaniStar, Double or multiple star, Variable of BY Dra type, Infra-Red source, High proper-motion Star, Rotationally variable Star, UV-emission source, Variable Star, X-ray sourceK11[x]
Epsilon FornacisStar, Infra-Red source, High proper-motion Star, UV-emission sourceK105[x]
Epsilon IndiStar, Double or multiple star, Infra-Red source, High proper-motion Star, Pre-main sequence Star, UV-emission source, X-ray sourceK12[x]
Epsilon PhoenicisStar, Infra-Red source, High proper-motion Star, UV-emission sourceK145[x]
Epsilon ReticuliStar, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission sourceK59[x]
Epsilon ScorpiiStar, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star, X-ray sourceK64[x]
Epsilon SerpentisStar, Infra-Red source, UV-emission source70[x]
Epsilon Trianguli AustralisStar, Double or multiple star, Infra-Red sourceK202[x]
Eta CepheiStar, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission sourceK46[x]
Eta ScutiStar, Infra-Red source, UV-emission sourceK202[x]
Eta SerpentisStar, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source, Variable StarK61[x]
EtaminStar, Double or multiple star, Infra-Red source, UV-emission sourceK154[x]
G HydraeStar, Infra-Red source, High proper-motion Star, UV-emission source, X-ray sourceK157[x]
G ScorpiiStar, Double or multiple star, Infra-Red source, UV-emission source, Variable StarK126[x]
Gamma MensaeStar, Double or multiple star, Infra-Red source, High proper-motion StarK102[x]
Gamma PictorisStar, Infra-Red source, UV-emission sourceK176[x]
Gamma SculptorisStar, Infra-Red sourceK182[x]
Gliese 2084Star, Double or multiple star, Infra-Red source, Estrela peculiar, High proper-motion Star, Variable of RS CVn type, sub-millimetric source, UV-emission source, Variable Star, X-ray sourceK146[x]
Gorgonea QuartaStar, Double or multiple star, Infra-Red source, UV-emission sourceK288[x]
Groombridge 1618Star, Double or multiple star, Estrela eruptiva, Infra-Red source, High proper-motion Star, Variable Star, X-ray sourceK16[x]
GrumiumStar, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission sourceK112[x]
h EridaniStar, Double or multiple star, Horizontal Branch Star, Infra-Red source, UV-emission sourceK184[x]
H ScorpiiStar, Infra-Red source, Variable StarK342[x]
HamalStar, Infra-Red source, High proper-motion Star, UV-emission source, Variable StarK66[x]
HD 129456Star, Infra-Red source, High proper-motion StarK210[x]
HIP 112441Star, Infra-Red sourceK142[x]
HIP 20277Star, High proper-motion StarK143[x]
HIP 26664Star, Infra-Red source, High proper-motion StarK144[x]
HIP 28393Star, Double or multiple star, Infra-Red source, Pre-main sequence Star, X-ray sourceK133[x]
HIP 98001Star, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela bináriaK151[x]
HR 8210Star, Variable Star of delta Sct type, Infra-Red source, Estrela binária, UV-emission source, Variable Star, Anã branca, X-ray source151[x]
Iota CentauriStar, Infra-Red source, High proper-motion Star59[x]
Iota CepheiStar, Infra-Red source, UV-emission source, Variable StarK116[x]
Iota CrucisStar, Double or multiple star, Infra-Red sourceK120[x]
Iota EridaniStar, Infra-Red source, UV-emission sourceK150[x]
Iota GruisStar, Infra-Red source, Estrela binária, UV-emission source, X-ray sourceK183[x]
Iota SagittariiStar, Infra-Red source, UV-emission sourceK182[x]
Iota SculptorisStar, Infra-Red source, Gigante vermelha, UV-emission source, X-ray sourceK331[x]
Kappa OphiuchiStar, Infra-Red source, Long Period Variable, High proper-motion Star, UV-emission source, Variable StarK91[x]
Kaus BorealisStar, Double or multiple star, Infra-Red source, UV-emission sourceK78[x]
KX LibraeStar, Double or multiple star, Variable of BY Dra type, Infra-Red source, High proper-motion Star, Variable StarK19[x]
Lambda PictorisStar, Infra-Red sourceK375[x]
LHS 71Star, Double or multiple star, Estrela eruptiva, Infra-Red source, High proper-motion Star, Variable StarK21[x]
LTT 13232Star, Infra-Red source, High proper-motion Star, X-ray sourceK97[x]
LTT 5873Star, Infra-Red source, High proper-motion Star, X-ray sourceK104[x]
MenkentStar, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission sourceK59[x]
MesarthimStar, Double or multiple star, Variable Star of alpha2 CVn type, Infra-Red source, UV-emission source, Variable Star204[x]
Mu LupiStar, Infra-Red source, Variável T Tauri, Variable Star, X-ray source, Objeto estelar jovemK336[x]
NashiraStar, Variable Star of alpha2 CVn type, Infra-Red source, UV-emission source, Variable Star157[x]