I an trying to calculate the temperature of a hypotethical planet orbiting the CHARA star at a distance of 1 AU. Now I know that the luminosity of Sol is 4x10^26 watts and that Chara's is about 20% more so 4.8x10^26 watts.(adsbygoogle = window.adsbygoogle || []).push({});

I found the following equation to calculate it:

( L )

Temp ( in K ) = (--------------) 1/4

(16*pi*S*R^2 )

L = Luminosity of star

S = Stefan-Boltzmann constant wich should be 5.67x10^-8

R = radius of planetary orbit in meters where 1 AU is .94x10^12, squared....

Heres where I foud this equation:

http://spiff.rit.edu/classes/phys230/lectures/life/life.html

I end up with stupid 476510.66 K ... this is supposed to be a planet, not a quasar ! Where am I wrong ?

Thanks for help !

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# Help with planetary temp. equation

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