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** Sun **

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This article is about the star. For other uses, see Sun (disambiguation).

The Sun Sun symbol.svg
Sun in February.jpgSun on February 18, 2015.
Observation data
Mean distance
from Earth 7011149600000000000♠1.496×10^8 km
8 min 19 s at light speed
Visual brightness (/V/) −26.74^[1]
Absolute magnitude 4.83^[1]
Spectral classification G2V
Metallicity /Z/ = 0.0122^[2]
Angular size 31.6–32.7′^[3]
Adjectives Solar
Orbital characteristics
Mean distance
from Milky Way core ≈ 7020270000000000000♠2.7×10^17 km
7004272000000000000♠27200 light-years
Galactic period (2.25–2.50)×10^8a
Velocity ≈ 7005220000000000000♠220 km/s (orbit around the
center of the Milky Way)
≈ 7004200000000000000♠20 km/s (relative to average velocity
of other stars in stellar neighborhood)
≈ 7005370000000000000♠370 km/s^[4] (relative to the cosmic
microwave background)
Physical characteristics
Equatorial radius 7008696342000000000♠696342±65 km^[5]
109 × Earth^[6]
Equatorial circumference 7009437900000000000♠4.379×10^6 km^[6]
109 × Earth^[6]
Flattening 6994900000000000000♠9×10^−6
Surface area 7018609000000000000♠6.09×10^12 km^2^[6]
7004120000000000000♠12000 × Earth^[6]
Volume 7027141000000000000♠1.41×10^18 km^3^[6]
7006130000000000000♠1300000 × Earth
Mass 7030198855000000000♠(1.98855±0.00025)×10^30 kg^[1]
7005333000000000000♠333000 × Earth^[1]
Average density 7003140800000000000♠1.408 g/cm^3^[1]^[6]^[7]
6999255000000000000♠0.255 × Earth^[1]^[6]
Center density (modeled) 7005162200000000000♠162.2 g/cm^3^[1]
7001124000000000000♠12.4 × Earth
Equatorial surface gravity 7002274000000000000♠274.0 m/s^2^[1]
7001279400000000000♠27.94 /g/
7004275422900000000♠27542.29 /cgs/
28 × Earth^[6]
Escape velocity
(from the surface) 7005617700000000000♠617.7 km/s^[6]
55 × Earth^[6]
Temperature Center (modeled): 7007157000000000000♠1.57×10^7 K^[1]
Photosphere (effective): 7003577800000000000♠5778 K^[1]
Corona: ≈ 7006500000000000000♠5×10^6 K
Luminosity (L[sol]) 7026384600000000000♠3.846×10^26 W^[1]
≈ 7028375000000000000♠3.75×10^28 lm
≈ 7001980000000000000♠98 lm/W efficacy
Mean
radiance (I[sol]) 7007200900000000000♠2.009×10^7 W·m^−2·sr^−1
Age ≈4.6 billion years^[8]^[9]
Rotation characteristics
Obliquity 7.25°^[1]
(to the ecliptic)
67.23°
(to the galactic plane)
Right ascension
of North pole^[10] 286.13°
19 h 4 min 30 s
Declination
of North pole +63.87°
63° 52' North
Sidereal rotation period
(at equator) 25.05 days^[1]
(at 16° latitude) 25.38 days^[1]
25 d 9 h 7 min 12 s^[10]
(at poles)


Source: en.wikipedia.org/wiki/Sun?sa=X

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