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physical object > natural object > celestial body > star > early star > white dwarf > Sirius B

Sirius B
subject			fact

Sirius B	has surface temperature Teff = 32000 K
	is a part of Canis Major
	has radius 0.03 solar radii
	has mass 1 solar mass
	has definition Companion of Sirius, a white dwarf.
	is an instance of white dwarf
white dwarf	has symbol D
	has symbol wd
early star	has spectral type O, B, A, and early F
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 proper motion
	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 apparent magnitude
	has absolute magnitude
	has age
	has catalog star catalog
	has material hydrogen, helium
	has velocity determined from proper motion and radial velocity
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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