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physical object > natural object > celestial body > star > late star > G star

G star
subject			fact

G star	has color yellowish
	has surface temperature 5000 to 6000 K
	has definition Spectral type for yellow stars.
	has definition 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.
	is a kind of late star
late star	has spectral type cooler than G2
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
	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 G star :

• alpha Centauri (16 facts) (Rigil Kent, 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.
• Alpha Equulei (10 facts) (HR 8131)
• Alpha Mensae (9 facts) (HR 2261)
• Alpha Reticuli (10 facts) (HR 1336)
• Beta Herculis (10 facts) (HR 6148)
• Beta Hydri (10 facts) (HR 98)
• Capella (14 facts) (HR 1708, Alpha Aurigae) - The sixth brightest star in the night sky, consists of two yellow giants. A spectroscopic triple (F8-G0 III, G5 III, M5 V) (1974 parallax 0'.079). It has a high lithium content and a nearly circular orbit. It may be an X-ray source.
• CH star (2 facts) - G-type giant (G5 to K5) in which the molecular bands of CH are very strong.
• Delta Crateris (10 facts) (HR 4382)
• Eta Piscium (10 facts) (HR 437)
• Gamma Microscopii (10 facts) (HR 8039)
• Gamma Normae (10 facts) (HR 6072)
• RW Aurigae (5 facts) - A T Tauri star with a strong ultraviolet excess.
• Sun (37 facts) - Star that Earth orbits. Central body of solar system. It takes about 1-10 million years for photons to diffuse from the Sun's interior to its surface. About 3% of the energy radiated is in the form of neutrinos. Every second about 655 million tons of H are being converted into 650 million tons of He. A grazing light ray is deflected 1".7 by the Sun. If the total angular momentum of the solar system were concentrated in the Sun, its equatorial rotation speed would be about 100 km s^-1.
• weak G-band star (3 facts) - G-type giant (G5 to K5) with a very weak or absent G band of CH and weak CN bands. These stars are C-deficient.
• yellow giant (3 facts) - A giant star with a spectral type of G. The nearest and brightest yellow giants are the two composing the double star Capella.
• yellow supergiant (2 kinds, 21 facts) - A supergiant star with a spectral type of G.

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