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physical object > naked eye object > naked eye star > alpha Centauri

alpha Centauri (Rigil Kent, HR 5459)
subject			fact

alpha Centauri	has declination -60 50 07
	has right ascension 14 39 36.2
	has period 80 years
	has spectral type G2V
	has V magnitude -0.01
	has proper motion 3'.68 per year
	has distance 4.35 light-years
	is a part of Centaurus
	has synonym Rigil Kent
	has synonym HR 5459
	has B-V magnitude 0.71
	has definition A binary star whose components have G2 V and K5 V spectral types. The nearest star system to the Sun and the third brightest star in the night sky.
	is an instance of binary star
	is an instance of G star
	is an instance of dwarf
	is an instance of naked eye star
dwarf	has symbol d
	has luminosity class V
naked eye star	has been observed for many centuries
	is usually part of asterism
	is a part of celestial sphere
	is a part of Milky Way
	has apparent magnitude brighter than 5
binary star	has number of stars 2
	has orbital period
G star	has color yellowish
	has surface temperature 5000 to 6000 K
star	has star surface temperature
	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 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 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
star system	has abundance half the stars in the solar neighborhood are members of star systems
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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