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physical object > natural object > celestial body > collection of stars > star system > binary star > Barnard's star

Barnard's star
subject			fact

Barnard's star	is a part of Ophiuchus
	has spectral type M5 V
	has proper motion 10.25 arcseconds per year
	has distance 1.83 pc
	has radial velocity 100 km/sec
	has discovery date 1916
	has discoverer Edward Emerson Barnard
	has orbital period 25 years
	has definition 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.
	is an instance of M star
	is an instance of red dwarf
	is an instance of binary star
binary star	has number of stars 2
red dwarf	has abundance 70 percent of all stars
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 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
dwarf	has symbol d
	has luminosity class V
	has synonym main sequence star
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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