K
恒星光谱

有效溫度
3,500–5,000 K

太阳半径
0.7–0.96 R_☉

太阳质量
0.45–0.8 M_☉

橙矮星，也就是K型主序星（KV），是主序帶（以氫為燃料）上，光譜類型為K，亮度分類為V的恆星。這些恆星的大小介於M-型主序星、亮度分類為V，和G-型主序星、亮度分類為V的恆星之間，質量是太陽質量的0.5至0.8倍，表面溫度在3,900至5,200K。, Tables VII, VIII.。這種恆星是我們尋找在地球外的生命時最感興趣的，因為它們停留在主序帶上穩定的時間很長（150億至300億年，相較之下太陽只有100億年），這樣就可能有機會在環繞著的類地行星上創造出生命。此種恆星的例子有半人馬座α星B和印第安座 ε 、奎宿增三、HD 13445、牛宿增十、天苑四。

Uses material from the Wikipedia article "橙矮星", which is released under the Creative Commons BY-SA 3.0.

	Astronomical object		距离	Wiki
1 Aurigae	Star, Infra-Red source	K	504	[x]
1 Pegasi	Star, Double or multiple star, Infra-Red source, 聯星, UV-emission source	K	156	[x]
109 Herculis	Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source, Variable Star	K	119	[x]
11 Cephei	Star, Infra-Red source, High proper-motion Star, UV-emission source	K	182	[x]
14 Herculis	Star, Double or multiple star, Infra-Red source, High proper-motion Star	K	58	[x]
15 Eridani	Star, Double or multiple star, Infra-Red source, UV-emission source	K	255	[x]
3 Andromedae	Star, Infra-Red source, High proper-motion Star	K	176	[x]
3 Persei	Star, Infra-Red source	K	245	[x]
30 Geminorum	Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source	K	289	[x]
31 Orionis	Star, Double or multiple star, Infra-Red source, Variable Star	K	508	[x]
36 Andromedae	Star, Double or multiple star, Infra-Red source, Variable Star	K	124	[x]
36 Ophiuchi	Star, Double or multiple star, Infra-Red source	K	19	[x]
39 Arietis	Star, Infra-Red source, High proper-motion Star, UV-emission source	K	171	[x]
41 Capricorni	Star, Double or multiple star, Infra-Red source	K	231	[x]
42 Draconis	Star, Infra-Red source, High proper-motion Star, UV-emission source	K	315	[x]
43 Tauri	Star, Infra-Red source, UV-emission source	K	284	[x]
47 Aquarii	Star, Infra-Red source, 紅巨星	K	171	[x]
49 Arietis	Star, Infra-Red source, UV-emission source, Variable Star		210	[x]
54 Piscium	Star, Infra-Red source, High proper-motion Star, Rotationally variable Star, Variable Star, X-ray source	K	36	[x]
56 Ceti	Star, Infra-Red source	K	353	[x]
6 Draconis	Star, Infra-Red source	K	602	[x]
6 Lyncis	Star, Double or multiple star, Infra-Red source, High proper-motion Star	K	182	[x]
61 Cygni	Star, Double or multiple star, Infra-Red source, X-ray source	K	11	[x]
64 Arietis	Star, Infra-Red source	K	208	[x]
66 Arietis	Star, Double or multiple star, Infra-Red source, UV-emission source	K	210	[x]
70 Ophiuchi	Star, Double or multiple star, Variable of BY Dra type, Infra-Red source, High proper-motion Star, 聯星, UV-emission source, Variable Star, X-ray source	K	16	[x]
75 Tauri	Star, Double or multiple star, Star in Cluster, Infra-Red source, UV-emission source, Variable Star	K	186	[x]
77 Aquarii	Star, Infra-Red source, High proper-motion Star, Variable Star	K	134	[x]
8 Persei	Star, Infra-Red source	K	411	[x]
9 Hydrae	Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source	K	212	[x]
93 Herculis	Star, Infra-Red source, UV-emission source	K	671	[x]
98 Aquarii	Star, Infra-Red source, UV-emission source	K	164	[x]
A Bootis	Star, Infra-Red source, 聯星, 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, 聯星, 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]
Ankaa	Star, Infra-Red source, High proper-motion Star, 聯星, UV-emission source	K	85	[x]
Arcturus	Star, Infra-Red source, High proper-motion Star, 紅巨星, 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]
BD+26 2184	Star, Infra-Red source	K	69	[x]
BD-01 2784	Star, Infra-Red source	K	67	[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]
BY Draconis	Star, Double or multiple star, Variable of BY Dra type, 耀星, Infra-Red source, High proper-motion Star, Radio-source, 聯星, 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]
CF 17413	Star, Infra-Red source, Pre-main sequence Star, X-ray source	K	96	[x]
CO Camelopardalis	Star, Ellipsoidal variable Star, Infra-Red source, 聯星, UV-emission source, Variable Star, X-ray source		109	[x]
D Centauri	Star, Double or multiple star, Infra-Red source	K	572	[x]
DE Bootis	Star, Infra-Red source, High proper-motion Star, Variable of RS CVn type, 聯星, UV-emission source, Variable Star, X-ray source	K	38	[x]
Delta Andromedae	Star, Double or multiple star, Infra-Red source, High proper-motion Star, 聯星, UV-emission source, Variable Star	K	105	[x]
Delta Aurigae	Star, Double or multiple star, Infra-Red source, High proper-motion Star, 聯星, UV-emission source	K	141	[x]
Delta Muscae	Star, Infra-Red source, High proper-motion Star, 聯星	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, 聯星, 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, 長週期變星, 特殊恆星, UV-emission source, Variable Star	K	690	[x]
EP Eridani	Star, Double or multiple star, 耀星, Infra-Red source, High proper-motion Star, Rotationally variable Star, Variable of RS CVn type, UV-emission source, Variable Star, X-ray source	K	34	[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]
Eta Cephei	Star, Double or multiple star, Infra-Red source, High proper-motion Star, UV-emission source	K	46	[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]
Gliese 2084	Star, Double or multiple star, Infra-Red source, 特殊恆星, High proper-motion Star, Variable of RS CVn type, sub-millimetric source, UV-emission source, Variable Star, X-ray source	K	146	[x]
Gliese 868	Star, Infra-Red source, High proper-motion Star	K	44	[x]
Gorgonea Quarta	Star, Double or multiple star, Infra-Red source, UV-emission source	K	288	[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]
HAT-P-3	Star, Infra-Red source, Extra-solar Planet, Variable Star	K	457	[x]
HD 129456	Star, Infra-Red source, High proper-motion Star	K	210	[x]
HIP 112441	Star, Infra-Red source	K	142	[x]
HIP 2	Star, Infra-Red source, High proper-motion Star	K	156	[x]
HIP 20277	Star, High proper-motion Star	K	143	[x]
HIP 2350	Star, Double or multiple star, Infra-Red source, High proper-motion Star	K	163	[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]

K恒星光谱

K
恒星光谱