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physical object > natural object > celestial body > star > late star > weak line star > lambda Bootis star |
lambda Bootis star | ||||
subject | fact |
lambda Bootis star | rotational velocity small | |
has radial velocity small | ||
has definition A type of young (usually early A), weak-lined, metal-poor stars with low radial velocities. | ||
has definition A-type stars with weak metallic lines, low rotational velocity and low radial velocity. | ||
is a kind of weak line star | ||
weak line star | has metallic line strength small | |
late star | has spectral type cooler than G2 | |
star | has star surface temperature | |
has V magnitude | ||
has B magnitude | ||
has U magnitude | ||
has position on celestial sphere from the point of view of Earth | ||
has parallax from the point of view of Earth's orbit | ||
has proper motion | ||
has radiation at surface which is diffused out from the hotter core | ||
has energy source gravitational contraction and or fusion | ||
has energy production which takes place primarily within the core | ||
has surface density which depends on luminosity class | ||
has surface temperature greater than 1000 Kelvin | ||
has apparent magnitude | ||
has absolute magnitude | ||
has age | ||
has catalog star catalog | ||
has material hydrogen, helium | ||
has velocity determined from proper motion and radial velocity | ||
has mass greater than 0.08 the sun's mass | ||
celestial body | has spectra | |
physical object | has location or center of gravity | |
has angular momentum | ||
has momentum | ||
has temperature | ||
has volume | ||
has extent |
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