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THE FEUTEX TOOLKIT

Stellar Luminosity from Radius and Temperature

Estimate luminosity relative to the Sun under a spherical blackbody model.

Astronomy workspace● Runs in your browser
01 Your input
02 Your result
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FormulaRelative luminosity = r**2*(t/5772)**4; Relative emitting area = r**2
Sources and model references

Worked example

Inputs

Radius relative to Sun
2 solar radii
Surface temperature
5772 K

Expected results

Relative luminosity
4 solar luminosities
Relative emitting area
4 solar areas

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Estimate luminosity relative to the Sun under a spherical blackbody model.
  2. Set radius relative to sun, surface temperature in the indicated units.
  3. Calculate and compare relative luminosity, relative emitting area.

Try this example

{
  "r": 2,
  "t": 5772
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.