Stellar Luminosity Calculator
Calculate stellar properties from radius and temperature
About Stellar Luminosity
Stellar luminosity is the total power output of a star. It depends on the surface area and temperature according to the Stefan-Boltzmann law.
Key Formulas:
- L = 4πR²σT⁴ (Stefan-Boltzmann)
- M = Msun - 2.5 log₁₀(L/Lsun) (absolute magnitude)
- m - M = 5 log₁₀(d) - 5 (distance modulus)
- λmax = 2898/T μm (Wien's law)
Reference Values:
- Sun: L☉ = 3.83 × 10²⁶ W, T = 5778 K
- Sirius A: ~25 L☉, T ≈ 9940 K
- Betelgeuse: ~100,000 L☉, T ≈ 3500 K