Sun (Anteria)

Sun

Pictured in visible light with solar filter in 2013 with sunspots and limb darkening.
False color image taken in 2010 as seen in ultraviolet light (wavelength of 30.4 nm)
Name	Sun
Adjectives	Solar
Observation data
Mean distance from Anteria	1 AU ≈ 1.496×108 km 8 min 19 s at speed of light
Apparent magnitude (V)	−26.74
Absolute magnitude	4.83
Spectral classification	G2V
Metallicity	Z = 0.0122
Angular size	31.6–32.7 minutes of arc ≈ 0.5 degrees
Orbit al characteristics
Mean distance from galactic core	≈ 2.7×1017 km ≈ 29,000 light-years
Galactic year	(225–250) million years
Velocity	≈ 220 km/s (orbit around the center of the galaxy) ≈ 20 km/s (relative to average velocity of other stars in stellar neighborhood) ≈ 370 km/s (relative to the Cosmic microwave background radiation
Physical characteristics
Equatorial radius	695,700
Equatorial circumference	4.379×106 km
Flattening	9×10−6
Surface area	6.09×1012 km2
Volume	1.41×1018 km3
Mass	1.9885×1030 kg
Average density	1.408 g/cm3
Center density (modeled)	162.2 g/cm3
Equatorial surface gravity	274 m/s2
Moment of inertia factor	0.070<
Escape velocity	617.7 km/s
Temperature	Center (modeled): 1.57×107 K
Luminosity	3.828×1026 W ≈ 3.75×1028 lm ≈ 98 lm/W Luminous efficacy
Color (B-V)	0.63
Mean radiance	2.009×107 W·m−2·sr−1
Age	≈ 4.6 billion years
Rotation characteristics
Obliquity	7.25° (to the ecliptic) 67.23° (to the galactic plane)
Right ascension of North pole	286.13° 19 h 4 min 30 s
Declination of North pole	+63.87° 63° 52' North
Sidereal rotation period (at equator)	25.05 d
(at 16° latitude)	25.38 d
(at poles)	34.4 d
Rotation velocity (at equator)	7.189×103 km/h
Photospheric composition (by mass)
Hydrogen	73.46%
Helium	24.85%
Oxygen	0.77%
Carbon	0.29%
Iron	0.16%
Neon	0.12%
Nitrogen	0.09%
Silicon	0.07%
Magnesium	0.05%
Sulphur	0.04%