A Planet Effective Temperature Complete Formula Te = [ Φ (1-a) S (β*N*cp)¹∕ ⁴ /4σ ]¹∕ ⁴

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11. Triton’s (Neptune’s satellite) Effective Temperature Calculation

11. Triton’s (Neptune’s satellite) Effective Temperature Calculation:

So = 1.362 W/m² (So is the Solar constant)

Triton’s albedo: atriton = 0,65 (0,60 –: 0,95)

1/R² = 1/30,11² = 1/907 = 0,0011025

Triton’s sidereal rotation period is 5 days 21 hours

Triton does N = 1/5,875 rotations/ per day (synchronous rotation)

Triton is a rocky planet, with no atmosphere,

Triton’s surface irradiation accepting factor Φtriton = 0,47

Triton can be considered as a nitrogen (N2) crust surface planet,

Cp.nitrogen = 0,2448 cal/gr*oC,

cp.H2O = 1 cal/gr*oC,

cp.CO2 = 0,1435 cal/gr*oC

Cp.triton.surface = Cp.nitrogen*0,55 + Cp.H2O * 0,25 + Cp.CO2*0,20 = 0,2448*0,55 + 1*0,35 + 0,1435*0,1 = 0,13464 + 0,35 + 0,1435= 0,62814 cal/gr*oC

 

β = 150 days*gr*oC/rotation*cal – it is the Planet Surface Solar Irradiation Absorbing-Emitting Universal Law constant

σ = 5,67*10⁻⁸ W/m²K⁴, a Stefan-Boltzmann constant

Triton’s effective temperature Te.triton is:

Te.triton = [ Φ (1-a) So (1/R²) (β*N*cp)¹∕ ⁴ /4σ ]¹∕ ⁴

Τe.triton = { 0,47*(1-0,65)*1.362 W/m² *0,0011025*[150 *(1/5,875)* 0,62814]¹∕ ⁴ /4*5,67*10⁻⁸ W/m²K⁴ }¹∕ ⁴ =

Te.triton = 38,40 K

Tsat.mean.triton = 38 K (−235.2 °C)