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THE FEUTEX TOOLKIT

Exoplanet Transit Depth

Estimate the fraction of stellar light blocked by a smaller opaque planet.

Astronomy workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaTransit depth = 100*(rp/rs)**2; Transit depth = 1e6*(rp/rs)**2
Sources and model references

Worked example

Inputs

Planet radius
1 arbitrary length
Star radius
10 same length

Expected results

Transit depth
1 %
Transit depth
10000 ppm

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 the fraction of stellar light blocked by a smaller opaque planet.
  2. Set planet radius, star radius in the indicated units.
  3. Calculate and compare transit depth, transit depth.

Try this example

{
  "rp": 1,
  "rs": 10
}

Accuracy and scope

Uniform stellar disk and central unobscured geometry; ignores limb darkening, spots and contamination.

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.