Astronomy   View all facts   Glossary   Help

physical object > natural object > celestial body > star > subgiant

subgiant
subject			fact

subgiant	has luminosity class IV
	has definition A star whose position on the H-R diagram is intermediate between that of main-sequence stars and normal giants of the same spectral type.
	is a kind of star
star	has star surface temperature
	has spectral type
	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 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
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has momentum
	has temperature
	has volume
	has extent

Kinds of subgiant :

• Achernar (13 facts) (alpha Eridani, HR 472)
• Alpha Andromedae (10 facts) (HR 15)
• Alpha Columbae (10 facts) (HR 1956)
• Alpha Gruis (10 facts) (HR 8425)
• Alpha Muscae (10 facts) (HR 4798)
• Alpha Pavonis (10 facts) (HR 7790)
• Alpha Pictoris (10 facts) (HR 2550)
• Alpha Telescopii (10 facts) (HR 6897)
• Beta Delphini (10 facts) (HR 7882)
• Beta Hydri (10 facts) (HR 98)
• Procyon (16 facts) (alpha CMi, HR 2943) - One of the nearest stars, it is the eighth brightest star. An F star. It is a visual binary; its companion is a DF8 white dwarf.

Next star: supergiant    Up: star    Previous star: subdwarf