G star Comparison Table

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G star comparison table

Subject has material has energy generating mass has synonym has rotational period at equator has period has luminosity class has right ascension has rotational period at pole has declination has emission line has mean density has inclination of rotational axis to pole of ecliptic is usually part of has absolute bolometric magnitude has magnetic field has proper motion has galactic orbital period is a kind of has luminosity has central temperature has observable variation time scale has age has escape velocity has galactic orbital velocity has surface temperature is part of has definition has amplitude has distance has number of star has B-V magnitude has name designated with has mean rotation spe has surface gravity has light curve has mass has abundance has optical brightness variation has author is an instance of has distance from galactic center has radiu has been observ has symbol has velocity has central density has density at surface has apparent magnitude has spectral type has energy source has distance from galactic plane has observational problem has velocity relative to nearby star has absolute visual magnitude has V magnitude

alpha Centauri hydrogen, helium HR 5459 80 years V 14 39 36.2 -60 50 07 asterism 3'.68 per year 5000 to 6000 K Milky Way 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. 4.35 light-years 2 0.71 greater than 0.08 the sun's mass half the stars in the solar neighborhood are members of star systems naked eye star for many centuries d determined from proper motion and radial velocity brighter than 5 G2V gravitational contraction and or fusion -0.01

Alpha Equulei hydrogen, helium HR 8131 III 21 15 49.3 + 5 14 52 asterism 5000 to 6000 K Milky Way 0.53 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G0III+A5V gravitational contraction and or fusion 3.92

Alpha Mensae hydrogen, helium HR 2261 V 06 10 14.6 -74 45 11 5000 to 6000 K Mensa 0.72 greater than 0.08 the sun's mass dwarf d determined from proper motion and radial velocity G6V gravitational contraction and or fusion 5.09

Alpha Reticuli hydrogen, helium HR 1336 II 04 14 25.5 -62 28 26 asterism 5000 to 6000 K Milky Way 0.91 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G8II-III gravitational contraction and or fusion 3.35

Beta Herculis hydrogen, helium HR 6148 III 16 30 13.1 +21 29 22 asterism 5000 to 6000 K Milky Way 0.94 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G7IIIa gravitational contraction and or fusion 2.77

Beta Hydri hydrogen, helium HR 98 IV 0 25 45.3 -77 15 16 asterism 5000 to 6000 K Milky Way 0.62 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G2IV gravitational contraction and or fusion 2.80

Capella hydrogen, helium Alpha Aurigae III 05 16 41.3 +45 59 53 asterism 5000 to 6000 K Milky Way 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. 13 pc 0.80 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G5IIIe+G0III gravitational contraction and or fusion 0.08

CH star hydrogen, helium G star 5000 to 6000 K G-type giant (G5 to K5) in which the molecular bands of CH are very strong. greater than 0.08 the sun's mass determined from proper motion and radial velocity cooler than G2 gravitational contraction and or fusion

Delta Crateris hydrogen, helium HR 4382 III 11 19 20.4 -14 46 43 asterism 5000 to 6000 K Milky Way 1.12 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G8III-IV gravitational contraction and or fusion 3.56

Eta Piscium hydrogen, helium HR 437 III 1 31 28.9 +15 20 45 asterism 5000 to 6000 K Milky Way 0.97 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G7IIIa gravitational contraction and or fusion 3.62

Gamma Microscopii hydrogen, helium HR 8039 III 21 1 17.4 -32 15 28 asterism 5000 to 6000 K Milky Way 0.89 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G6III gravitational contraction and or fusion 4.67

Gamma Normae hydrogen, helium HR 6072 III 16 19 50.3 -50 09 20 asterism 5000 to 6000 K Milky Way 1.08 greater than 0.08 the sun's mass naked eye star for many centuries determined from proper motion and radial velocity brighter than 5 G8III gravitational contraction and or fusion 4.02

RW Aurigae hydrogen, helium nebular variable V within a period of decades 5000 to 6000 K A T Tauri star with a strong ultraviolet excess.
R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted
AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted
V 335, V 336, etc., when the double letter designations are exhausted
greater than 0.08 the sun's mass 0.2 magnitudes or greater dwarf d determined from proper motion and radial velocity G5e V gravitational contraction and or fusion some difficulty in distinguishing between various kinds

Sun 0.35 M_sun disk star 24^d6^h V (main-sequence) 35 days 1.409 g cm^-3 7�15' M_bol = +4.67 1-2 gauss as high as 10-1000 gauss in active regions 220 million years (e ≈ 0) 3.83 × 10³³ ergs s^-1 14-15 × 10⁶ K 4.6 billion years V_esc = 618 km s^-1 V_orb = 250-300 km s^-1 5785 K disk 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. 1.9 km s^-1 27398 cm s^-2 1.989 × 10³³ g Baade (1944) naked eye object 27000 light-years 695990 km d 155 g cm^-3 (Bahcall 1973) 3 × 10^-7 g cm^-3 -26.74 G2 proton-proton reaction 35 light-years 20 km s^-1 toward R.A. 18^h4^m, declination +30� (towards in Hercules) M_v = +4.85

weak G-band star hydrogen, helium III giant 5000 to 6000 K 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. greater than 0.08 the sun's mass determined from proper motion and radial velocity cooler than G2 gravitational contraction and or fusion

yellow giant hydrogen, helium III G star 5000 to 6000 K A giant star with a spectral type of G. The nearest and brightest yellow giants are the two composing the double star Capella. greater than 0.08 the sun's mass determined from proper motion and radial velocity cooler than G2 gravitational contraction and or fusion

yellow supergiant hydrogen, helium I G star 5000 to 6000 K A supergiant star with a spectral type of G. greater than 0.08 the sun's mass determined from proper motion and radial velocity gravitational contraction and or fusion

Next late star: H and K emission line star Up: late star Previous late star: CN-strong star

Subject	has material	has energy generating mass	has synonym	has rotational period at equator	has period	has luminosity class	has right ascension	has rotational period at pole	has declination	has emission line	has mean density	has inclination of rotational axis to pole of ecliptic	is usually part of	has absolute bolometric magnitude	has magnetic field	has proper motion	has galactic orbital period	is a kind of	has luminosity	has central temperature	has observable variation time scale	has age	has escape velocity	has galactic orbital velocity	has surface temperature	is part of	has definition	has amplitude	has distance	has number of star	has B-V magnitude	has name designated with	has mean rotation spe	has surface gravity	has light curve	has mass	has abundance	has optical brightness variation	has author	is an instance of	has distance from galactic center	has radiu	has been observ	has symbol	has velocity	has central density	has density at surface	has apparent magnitude	has spectral type	has energy source	has distance from galactic plane	has observational problem	has velocity relative to nearby star	has absolute visual magnitude	has V magnitude
alpha Centauri	hydrogen, helium		HR 5459		80 years	V	14 39 36.2		-60 50 07				asterism			3'.68 per year									5000 to 6000 K	Milky Way	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.		4.35 light-years	2	0.71					greater than 0.08 the sun's mass	half the stars in the solar neighborhood are members of star systems			naked eye star			for many centuries	d	determined from proper motion and radial velocity			brighter than 5	G2V	gravitational contraction and or fusion					-0.01
Alpha Equulei	hydrogen, helium		HR 8131			III	21 15 49.3		+ 5 14 52				asterism												5000 to 6000 K	Milky Way					0.53					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G0III+A5V	gravitational contraction and or fusion					3.92
Alpha Mensae	hydrogen, helium		HR 2261			V	06 10 14.6		-74 45 11																5000 to 6000 K	Mensa					0.72					greater than 0.08 the sun's mass				dwarf				d	determined from proper motion and radial velocity				G6V	gravitational contraction and or fusion					5.09
Alpha Reticuli	hydrogen, helium		HR 1336			II	04 14 25.5		-62 28 26				asterism												5000 to 6000 K	Milky Way					0.91					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G8II-III	gravitational contraction and or fusion					3.35
Beta Herculis	hydrogen, helium		HR 6148			III	16 30 13.1		+21 29 22				asterism												5000 to 6000 K	Milky Way					0.94					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G7IIIa	gravitational contraction and or fusion					2.77
Beta Hydri	hydrogen, helium		HR 98			IV	0 25 45.3		-77 15 16				asterism												5000 to 6000 K	Milky Way					0.62					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G2IV	gravitational contraction and or fusion					2.80
Capella	hydrogen, helium		Alpha Aurigae			III	05 16 41.3		+45 59 53				asterism												5000 to 6000 K	Milky Way	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.		13 pc		0.80					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G5IIIe+G0III	gravitational contraction and or fusion					0.08
CH star	hydrogen, helium																	G star							5000 to 6000 K		G-type giant (G5 to K5) in which the molecular bands of CH are very strong.									greater than 0.08 the sun's mass									determined from proper motion and radial velocity				cooler than G2	gravitational contraction and or fusion
Delta Crateris	hydrogen, helium		HR 4382			III	11 19 20.4		-14 46 43				asterism												5000 to 6000 K	Milky Way					1.12					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G8III-IV	gravitational contraction and or fusion					3.56
Eta Piscium	hydrogen, helium		HR 437			III	1 31 28.9		+15 20 45				asterism												5000 to 6000 K	Milky Way					0.97					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G7IIIa	gravitational contraction and or fusion					3.62
Gamma Microscopii	hydrogen, helium		HR 8039			III	21 1 17.4		-32 15 28				asterism												5000 to 6000 K	Milky Way					0.89					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G6III	gravitational contraction and or fusion					4.67
Gamma Normae	hydrogen, helium		HR 6072			III	16 19 50.3		-50 09 20				asterism												5000 to 6000 K	Milky Way					1.08					greater than 0.08 the sun's mass				naked eye star			for many centuries		determined from proper motion and radial velocity			brighter than 5	G8III	gravitational contraction and or fusion					4.02
RW Aurigae	hydrogen, helium		nebular variable			V															within a period of decades				5000 to 6000 K		A T Tauri star with a strong ultraviolet excess.					R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted V 335, V 336, etc., when the double letter designations are exhausted				greater than 0.08 the sun's mass		0.2 magnitudes or greater		dwarf				d	determined from proper motion and radial velocity				G5e V	gravitational contraction and or fusion		some difficulty in distinguishing between various kinds
Sun		0.35 M_sun	disk star	24^d6^h		V (main-sequence)		35 days			1.409 g cm^-3	7�15'		M_bol = +4.67	1-2 gauss as high as 10-1000 gauss in active regions		220 million years (e ≈ 0)		3.83 × 10³³ ergs s^-1	14-15 × 10⁶ K		4.6 billion years	V_esc = 618 km s^-1	V_orb = 250-300 km s^-1	5785 K	disk	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.						1.9 km s^-1	27398 cm s^-2		1.989 × 10³³ g			Baade (1944)	naked eye object	27000 light-years	695990 km		d		155 g cm^-3 (Bahcall 1973)	3 × 10^-7 g cm^-3	-26.74	G2	proton-proton reaction	35 light-years		20 km s^-1 toward R.A. 18^h4^m, declination +30� (towards in Hercules)	M_v = +4.85
weak G-band star	hydrogen, helium					III												giant							5000 to 6000 K		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.									greater than 0.08 the sun's mass									determined from proper motion and radial velocity				cooler than G2	gravitational contraction and or fusion
yellow giant	hydrogen, helium					III												G star							5000 to 6000 K		A giant star with a spectral type of G. The nearest and brightest yellow giants are the two composing the double star Capella.									greater than 0.08 the sun's mass									determined from proper motion and radial velocity				cooler than G2	gravitational contraction and or fusion
yellow supergiant	hydrogen, helium					I												G star							5000 to 6000 K		A supergiant star with a spectral type of G.									greater than 0.08 the sun's mass									determined from proper motion and radial velocity					gravitational contraction and or fusion