alpha Centauri Comparison Table

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alpha Centauri comparison table

Subject has right ascension has declination has spectral type is part of has surface temperature is an instance of has V magnitude has been observ has color has symbol has B-V magnitude has distance has abundance has period is usually part of has proper motion is a kind of has apparent magnitude has synonym has definition has luminosity class has number of star

binary star greater than 1000 Kelvin half the stars in the solar neighborhood are members of star systems star system A system of two stars orbiting around a common center of gravity. Visual binaries are those whose components can be resolved telescopically (i.e., angular separation > 0'.5) and which have detectable orbital motion. Astrometric binaries are those whose dual nature can be deduced from their variable proper motion; spectroscopic binaries, those whose dual nature can be deduced from their variable radial velocity. At least half of the stars in the solar neighborhood are members of binary (or multiple) systems. (See photometric binaries; optical pairs.) 2

dwarf greater than 1000 Kelvin d star main sequence star Star with mass equal to or less than that of the sun. More generally, any star on or below the main sequence in the Hertzprung-Russell diagram. V

G star cooler than G2 5000 to 6000 K yellowish late star Yellowish star in which the H and K lines of Ca II have become dominant and in which a tremendous profusion of spectral lines of both neutral and ionized metals, particularly iron, begins to show. The Balmer lines of hydrogen are still recognizable. Examples are the Sun and Capella.

naked eye star Milky Way greater than 1000 Kelvin for many centuries asterism naked eye object brighter than 5 A star visible without visual aids

alpha Centauri 14 39 36.2 -60 50 07 G2V Milky Way 5000 to 6000 K naked eye star -0.01 for many centuries yellowish d 0.71 4.35 light-years half the stars in the solar neighborhood are members of star systems 80 years asterism 3'.68 per year brighter than 5 HR 5459 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. V 2

Next binary star: astrometric binary Up: binary star, dwarf, G star, naked eye star Previous binary star: 17 Leporis

Subject	has right ascension	has declination	has spectral type	is part of	has surface temperature	is an instance of	has V magnitude	has been observ	has color	has symbol	has B-V magnitude	has distance	has abundance	has period	is usually part of	has proper motion	is a kind of	has apparent magnitude	has synonym	has definition	has luminosity class	has number of star
binary star					greater than 1000 Kelvin								half the stars in the solar neighborhood are members of star systems				star system			A system of two stars orbiting around a common center of gravity. Visual binaries are those whose components can be resolved telescopically (i.e., angular separation > 0'.5) and which have detectable orbital motion. Astrometric binaries are those whose dual nature can be deduced from their variable proper motion; spectroscopic binaries, those whose dual nature can be deduced from their variable radial velocity. At least half of the stars in the solar neighborhood are members of binary (or multiple) systems. (See photometric binaries; optical pairs.)		2
dwarf					greater than 1000 Kelvin					d							star		main sequence star	Star with mass equal to or less than that of the sun. More generally, any star on or below the main sequence in the Hertzprung-Russell diagram.	V
G star			cooler than G2		5000 to 6000 K				yellowish								late star			Yellowish star in which the H and K lines of Ca II have become dominant and in which a tremendous profusion of spectral lines of both neutral and ionized metals, particularly iron, begins to show. The Balmer lines of hydrogen are still recognizable. Examples are the Sun and Capella.
naked eye star				Milky Way	greater than 1000 Kelvin			for many centuries							asterism		naked eye object	brighter than 5		A star visible without visual aids
alpha Centauri	14 39 36.2	-60 50 07	G2V	Milky Way	5000 to 6000 K	naked eye star	-0.01	for many centuries	yellowish	d	0.71	4.35 light-years	half the stars in the solar neighborhood are members of star systems	80 years	asterism	3'.68 per year		brighter than 5	HR 5459	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.	V	2