K
Classificação estelar
3,500–5,000 K
0.7–0.96 R☉
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 | Distância | Wiki | ||
---|---|---|---|---|
14 Herculis | Star, Double or multiple star, Infra-Red source, High proper-motion Star | K | 58 | [x] |
36 Ophiuchi | Star, Double or multiple star, Infra-Red source | K | 19 | [x] |
54 Piscium | Star, Infra-Red source, High proper-motion Star, Rotationally variable Star, Variable Star, X-ray source | K | 36 | [x] |
6 Draconis | Star, Infra-Red source | K | 602 | [x] |
61 Cygni | Star, Double or multiple star, Infra-Red source, X-ray source | K | 11 | [x] |
70 Ophiuchi | Star, 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 source | K | 16 | [x] |
98 Aquarii | Star, Infra-Red source, UV-emission source | K | 164 | [x] |
A Bootis | Star, Infra-Red source, Estrela binária, UV-emission source | K | 234 | [x] |
AB Pictoris | Star, Variable of BY Dra type, Infra-Red source, Pre-main sequence Star, UV-emission source, Variable Star, X-ray source | K | 150 | [x] |
Albireo | Star, Double or multiple star, Star in double system, Infra-Red source, Variable Star | K | 435 | [x] |
Aldebaran | Star, Double or multiple star, Infra-Red source, Long Period Variable, High proper-motion Star, UV-emission source, Variable Star | K | 67 | [x] |
Algieba | Star, Double or multiple star, Infra-Red source | K | 130 | [x] |
Alpha Antliae | Star, Infra-Red source, Variable Star | K | 366 | [x] |
Alpha Horologii | Star, Infra-Red source, High proper-motion Star, UV-emission source | K | 115 | [x] |
Alpha Indi | Star, Double or multiple star, Infra-Red source, UV-emission source | K | 98 | [x] |
Alpha Scuti | Star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star | K | 199 | [x] |
Alpha Tucanae | Star, Double or multiple star, Infra-Red source, Estrela binária, UV-emission source | K | 200 | [x] |
Alpha Volantis | Star, Double or multiple star, Infra-Red source, UV-emission source | 125 | [x] | |
Alphard | Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star | K | 180 | [x] |
Alsciaukat | Star, Infra-Red source, Semi-regular pulsating Star, Variable Star | K | 382 | [x] |
Angetenar | Star, Double or multiple star, Infra-Red source, UV-emission source, X-ray source | K | 187 | [x] |
Ankaa | Star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission source | K | 85 | [x] |
Arcturus | Star, Infra-Red source, High proper-motion Star, Gigante vermelha, UV-emission source, Variable Star | K | 37 | [x] |
Asellus Australis | Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source | K | 131 | [x] |
Azha | Star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star | K | 136 | [x] |
b Capricorni | Star, Infra-Red source, UV-emission source | K | 171 | [x] |
B Centauri | Star, Infra-Red source | K | 433 | [x] |
Baten Kaitos | Star, Double or multiple star, Infra-Red source, Estrela binária, UV-emission source, Variable Star | K | 235 | [x] |
BD+14 4559 | Star, Infra-Red source, High proper-motion Star | K | 158 | [x] |
BD+75 58 | Star, Infra-Red source | K | 55 | [x] |
Beta Reticuli | Star, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission source | K | 100 | [x] |
Beta Volantis | Star, Infra-Red source, Variable Star | K | 108 | [x] |
Botein | Star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star | K | 169 | [x] |
Bunda | Star, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission source | K | 73 | [x] |
BY Draconis | Star, 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 source | K | 53 | [x] |
Cebalrai | Star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star | K | 82 | [x] |
CO Camelopardalis | Star, Ellipsoidal variable Star, Infra-Red source, Estrela binária, UV-emission source, Variable Star, X-ray source | 109 | [x] | |
D Centauri | Star, Double or multiple star, Infra-Red source | K | 572 | [x] |
Delta Andromedae | Star, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission source, Variable Star | K | 105 | [x] |
Delta Aurigae | Star, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária, UV-emission source | K | 141 | [x] |
Delta Leporis | Star, Infra-Red source, High proper-motion Star, UV-emission source | K | 113 | [x] |
Delta Muscae | Star, Infra-Red source, High proper-motion Star, Estrela binária | K | 90 | [x] |
Delta Normae | Star, Infra-Red source, UV-emission source | 123 | [x] | |
Delta Octantis | Star, Infra-Red source, High proper-motion Star, Variable Star | K | 299 | [x] |
Deneb Algedi | Star, 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 source | 39 | [x] | |
Diphda | Star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star, X-ray source | K | 96 | [x] |
e Centauri | Star, Infra-Red source | K | 294 | [x] |
Enif | Star, Double or multiple star, Infra-Red source, Long-period variable star, Estrela peculiar, UV-emission source, Variable Star | K | 690 | [x] |
Epsilon Circini | Star, Infra-Red source | K | 408 | [x] |
Epsilon Crucis | Star, Infra-Red source, High proper-motion Star, Variable Star | K | 230 | [x] |
Epsilon Cygni | Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source | K | 72 | [x] |
Epsilon Eridani | Star, 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 source | K | 11 | [x] |
Epsilon Fornacis | Star, Infra-Red source, High proper-motion Star, UV-emission source | K | 105 | [x] |
Epsilon Indi | Star, Double or multiple star, Infra-Red source, High proper-motion Star, Pre-main sequence Star, UV-emission source, X-ray source | K | 12 | [x] |
Epsilon Phoenicis | Star, Infra-Red source, High proper-motion Star, UV-emission source | K | 145 | [x] |
Epsilon Reticuli | Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source | K | 59 | [x] |
Epsilon Scorpii | Star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star, X-ray source | K | 64 | [x] |
Epsilon Serpentis | Star, Infra-Red source, UV-emission source | 70 | [x] | |
Epsilon Trianguli Australis | Star, Double or multiple star, Infra-Red source | K | 202 | [x] |
Eta Cephei | Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source | K | 46 | [x] |
Eta Scuti | Star, Infra-Red source, UV-emission source | K | 202 | [x] |
Eta Serpentis | Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star | K | 61 | [x] |
Etamin | Star, Double or multiple star, Infra-Red source, UV-emission source | K | 154 | [x] |
G Hydrae | Star, Infra-Red source, High proper-motion Star, UV-emission source, X-ray source | K | 157 | [x] |
G Scorpii | Star, Double or multiple star, Infra-Red source, UV-emission source, Variable Star | K | 126 | [x] |
Gamma Mensae | Star, Double or multiple star, Infra-Red source, High proper-motion Star | K | 102 | [x] |
Gamma Pictoris | Star, Infra-Red source, UV-emission source | K | 176 | [x] |
Gamma Sculptoris | Star, Infra-Red source | K | 182 | [x] |
Gliese 2084 | Star, 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 source | K | 146 | [x] |
Gorgonea Quarta | Star, Double or multiple star, Infra-Red source, UV-emission source | K | 288 | [x] |
Groombridge 1618 | Star, Double or multiple star, Estrela eruptiva, Infra-Red source, High proper-motion Star, Variable Star, X-ray source | K | 16 | [x] |
Grumium | Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source | K | 112 | [x] |
h Eridani | Star, Double or multiple star, Horizontal Branch Star, Infra-Red source, UV-emission source | K | 184 | [x] |
H Scorpii | Star, Infra-Red source, Variable Star | K | 342 | [x] |
Hamal | Star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star | K | 66 | [x] |
HD 129456 | Star, Infra-Red source, High proper-motion Star | K | 210 | [x] |
HIP 112441 | Star, Infra-Red source | K | 142 | [x] |
HIP 20277 | Star, High proper-motion Star | K | 143 | [x] |
HIP 26664 | Star, Infra-Red source, High proper-motion Star | K | 144 | [x] |
HIP 28393 | Star, Double or multiple star, Infra-Red source, Pre-main sequence Star, X-ray source | K | 133 | [x] |
HIP 98001 | Star, Double or multiple star, Infra-Red source, High proper-motion Star, Estrela binária | K | 151 | [x] |
HR 8210 | Star, Variable Star of delta Sct type, Infra-Red source, Estrela binária, UV-emission source, Variable Star, Anã branca, X-ray source | 151 | [x] | |
Iota Centauri | Star, Infra-Red source, High proper-motion Star | 59 | [x] | |
Iota Cephei | Star, Infra-Red source, UV-emission source, Variable Star | K | 116 | [x] |
Iota Crucis | Star, Double or multiple star, Infra-Red source | K | 120 | [x] |
Iota Eridani | Star, Infra-Red source, UV-emission source | K | 150 | [x] |
Iota Gruis | Star, Infra-Red source, Estrela binária, UV-emission source, X-ray source | K | 183 | [x] |
Iota Sagittarii | Star, Infra-Red source, UV-emission source | K | 182 | [x] |
Iota Sculptoris | Star, Infra-Red source, Gigante vermelha, UV-emission source, X-ray source | K | 331 | [x] |
Kappa Ophiuchi | Star, Infra-Red source, Long Period Variable, High proper-motion Star, UV-emission source, Variable Star | K | 91 | [x] |
Kaus Borealis | Star, Double or multiple star, Infra-Red source, UV-emission source | K | 78 | [x] |
KX Librae | Star, Double or multiple star, Variable of BY Dra type, Infra-Red source, High proper-motion Star, Variable Star | K | 19 | [x] |
Lambda Pictoris | Star, Infra-Red source | K | 375 | [x] |
LHS 71 | Star, Double or multiple star, Estrela eruptiva, Infra-Red source, High proper-motion Star, Variable Star | K | 21 | [x] |
LTT 13232 | Star, Infra-Red source, High proper-motion Star, X-ray source | K | 97 | [x] |
LTT 5873 | Star, Infra-Red source, High proper-motion Star, X-ray source | K | 104 | [x] |
Menkent | Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source | K | 59 | [x] |
Mesarthim | Star, Double or multiple star, Variable Star of alpha2 CVn type, Infra-Red source, UV-emission source, Variable Star | 204 | [x] | |
Mu Lupi | Star, Infra-Red source, Variável T Tauri, Variable Star, X-ray source, Objeto estelar jovem | K | 336 | [x] |
Nashira | Star, Variable Star of alpha2 CVn type, Infra-Red source, UV-emission source, Variable Star | 157 | [x] |