Barnard's star Comparison Table

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Barnard's star comparison table

Subject has spectral type is part of is an instance of has symbol has distance has abundance has proper motion has discoverer has radial velocity is a kind of has synonym has definition has discovery date has luminosity class has number of star

binary star 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

M star cooler than G2 late star Having a spectral type of M, that is, red like Betelgeuse and Antares.

red dwarf M d 70 percent of all stars dwarf main sequence star A main-sequence star with spectral type M. Red dwarfs are much fainter, cooler, and smaller than the Sun but are the most common type of star in the Galaxy, accounting for 70 percent of all stars. V

Barnard's star M5 V Ophiuchus binary star d 1.83 pc 70 percent of all stars 10.25 arcseconds per year Edward Emerson Barnard 100 km/sec main sequence star A faint binary star with the second largest proper motion known. Long-term observations of its light curve suggest a possible third component with a mass about 1.2 that of Jupiter, although this observation has been challenged. 1916 V 2

Subject	has spectral type	is part of	is an instance of	has symbol	has distance	has abundance	has proper motion	has discoverer	has radial velocity	is a kind of	has synonym	has definition	has discovery date	has luminosity class	has number of star
binary star						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
M star	cooler than G2									late star		Having a spectral type of M, that is, red like Betelgeuse and Antares.
red dwarf	M			d		70 percent of all stars				dwarf	main sequence star	A main-sequence star with spectral type M. Red dwarfs are much fainter, cooler, and smaller than the Sun but are the most common type of star in the Galaxy, accounting for 70 percent of all stars.		V
Barnard's star	M5 V	Ophiuchus	binary star	d	1.83 pc	70 percent of all stars	10.25 arcseconds per year	Edward Emerson Barnard	100 km/sec		main sequence star	A faint binary star with the second largest proper motion known. Long-term observations of its light curve suggest a possible third component with a mass about 1.2 that of Jupiter, although this observation has been challenged.	1916	V	2

Next binary star: close binary Up: binary star, M star, red dwarf Previous binary star: astrometric binary