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physical object > natural object > celestial body > star > early star > O star > O(f)
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O(f)
subjectfact 
O(f)has emission line N III and sometimes He II2001-09-27 09:30:28.0
has definition O-type stars in which N III is present in emission and He II is weakly present in absorption or emission.has source: Jaschek, C., Jaschek, M. 1995 The Behavior of Chemical Elements in Stars, Cambridge University Press, 2001-09-27 09:30:27.0
is a kind of emission line star2001-09-27 09:30:27.0
is a kind of O star2001-09-27 09:30:27.0
O starhas lifetime 3 to 6 million years2001-09-27 09:30:45.0
has color blue-white2001-09-27 09:30:45.0
has surface temperature 35000 K2001-09-27 09:30:45.0
has relative abundance rare2001-09-27 09:30:45.0
has rotation velocity very high2001-09-27 09:30:45.0
has absorption line He II2001-09-27 09:30:45.0
early starhas spectral type O, B, A, and early F2001-09-27 09:30:44.0
starhas star surface temperature2001-09-27 09:30:25.0
has spectral type2001-09-27 09:30:25.0
has V magnitude2001-09-27 09:30:25.0
has B magnitude2001-09-27 09:30:25.0
has U magnitude2001-09-27 09:30:25.0
has position on celestial sphere from the point of view of Earth2001-09-27 09:30:25.0
has parallax from the point of view of Earth's orbit2001-09-27 09:30:25.0
has proper motion2001-09-27 09:30:24.0
has radiation at surface which is diffused out from the hotter core2001-09-27 09:30:24.0
has energy source gravitational contraction and or fusion2001-09-27 09:30:24.0
has energy production which takes place primarily within the core2001-09-27 09:30:24.0
has surface density which depends on luminosity class2001-09-27 09:30:24.0
has apparent magnitude2001-09-27 09:30:25.0
has absolute magnitude2001-09-27 09:30:25.0
has age2001-09-27 09:30:25.0
has catalog star catalog2001-09-27 09:30:25.0
has material hydrogen, helium2001-09-27 09:30:24.0
has velocity determined from proper motion and radial velocity2001-09-27 09:30:25.0
has mass greater than 0.08 the sun's mass2001-09-27 09:30:24.0
celestial bodyhas spectra2001-09-27 09:30:09.0
physical objecthas location or center of gravity2001-09-27 09:27:27.0
has angular momentum2001-09-27 09:27:27.0
has momentum2001-09-27 09:27:27.0
has temperature2001-09-27 09:27:27.0
has volume2001-09-27 09:27:27.0
has extent2001-09-27 09:27:27.0

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