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gptkbp:instanceOf
|
stellar classification
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gptkbp:color
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gptkb:orange
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gptkbp:commonIn
|
second most common main sequence stars
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gptkbp:compared_to_M-type_stars
|
hotter and more massive
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gptkbp:compared_to_Sun
|
cooler and less massive
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gptkbp:discoveredBy
|
19th century spectral classification
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gptkbp:end_state
|
white dwarf
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gptkbp:example
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gptkb:Epsilon_Indi
gptkb:Alpha_Centauri_B
gptkb:61_Cygni_A
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gptkbp:fraction_of_Milky_Way_stars
|
~12%
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gptkbp:giant_branch
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gptkb:K_III
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gptkbp:giant_name
|
K giant
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gptkbp:habitable_zone_distance
|
0.3–1.3 AU
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gptkbp:host_exoplanets
|
yes
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|
https://www.w3.org/2000/01/rdf-schema#label
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K-type stars
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gptkbp:luminosity_class
|
III (giant)
V (main sequence)
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gptkbp:magnetic_activity
|
moderate
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gptkbp:main_sequence
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gptkb:K_V
|
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gptkbp:main_sequence_lifetime
|
15–30 billion years
|
|
gptkbp:main_sequence_luminosity
|
0.08–0.6 solar luminosities
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gptkbp:main_sequence_name
|
K dwarf
|
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gptkbp:metallicity
|
varied
|
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gptkbp:notable_for
|
long stable lifetimes
|
|
gptkbp:potential_for_habitable_planets
|
high
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gptkbp:range
|
0.6–0.9 solar masses
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gptkbp:rotation_rate
|
slower than O, B, A stars
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gptkbp:spectral_lines
|
strong metallic lines
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gptkbp:spectralType
|
K
|
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gptkbp:subspecies
|
K0, K1, K2, K3, K4, K5, K6, K7, K8, K9
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gptkbp:surfaceGravity
|
varies by class
|
|
gptkbp:temperature
|
3900–5200 K
|
|
gptkbp:UV_radiation
|
lower than G-type stars
|
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gptkbp:進化
|
become red giants
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gptkbp:bfsParent
|
gptkb:Population_I
gptkb:main_sequence
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gptkbp:bfsLayer
|
6
|