Astrophysics (index)about

G-type star

(G, G dwarf, G-class star)
(stars spectrally similar to the Sun)

A G-type star (i.e., G-class star or G dwarf), is a star of the G-class, i.e., the spectral class for stars spectrally similar to the Sun, applicable to main sequence stars of roughly a solar mass and solar radius. They burn their hydrogen in about ten billion years, and have weak hydrogen absorption lines. Characteristics of such a main sequence star:

yellowconventional color
5500-6000Ksurface temperature
2.6-4.7absolute magnitude(visual)
.5-1.2bolometric luminosity(solar)
9-18 billion yearsmain-sequence lifetime

(star type,spectral type)
387nm775THz3.3eVbeginG-type star
527nm569THz2.4eVendG-type star

Referenced by:
calcium (Ca)
FGK star
55 Cancri e (55 Cnc e)
51 Pegasi b (51 Peg b)
G band
G-dwarf problem
HD 133131
HD 209458 b
HD 80606 b
Kepler Telescope
Morgan classification
solar mass (MSun)
multiplicity fraction
spectral class
Transiting Exoplanet Survey Satellite (TESS)
Wilson-Bappu effect