Introduction to Astrophysics/Astronomical Constants

Speed of light: c = 2.99792458 × 108 m s-1
Gravitation Constant: G = 6.6742(10) × 10-11 m3 kg-1s-2
Mass of Sun: Msun = 1.99 × 1030 kg
Luminosity of Sun: Lsun = 3.83 × 1026 J s-1
Radius of Sun: Rsun = 6.96 × 108 m
1 astronomical unit (AU): 1.496 × 1011 m
1 light year (ly): 9.461 × 1015 m = 0.307 pc
1 parsec (pc): 3.086 × 1016 m = 3.26 ly
Solar effective temperature: Teff = 5777 K
Hubble Constant: H0 = 70.1±1.3 kms-1 Mpc-1
Cosmological Constant: |Λ|≤10-51 m-2
Cosmic background radiation = 2.725(1) K
Mass of Earth: Me = 5.97370(76) × 1024 kg
Radius of Earth: Re = 6.378136 × 106 m

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Last modified on 30 March 2009, at 20:41