Limb Darkening Calculator


The Limb Darkening Calculator calculates limb-darkening coefficients for a specified stellar model, plotting results versus intensity ratio and wavelength. If planetary orbital parameters are included, SPAM coefficients will also be returned.


The name of an exoplanet target to resolve
Wavelength Range: 0.1\(\mu\)m - 30.0\(\mu\)m
Wavelength Range: 0.1\(\mu\)m - 2.6\(\mu\)m
\(T_\text{eff}\)
K
The stellar effective temperature (3500.0 - 8750.0)
\(\log (g)\)
dex
The logarithm of the stellar surface gravity (3.0 - 5.0)
\([\text{Fe}/\text{H}]\)
dex
The logarithm of the stellar metallicity (-0.5 - 0.5)
Transit Duration
hour
The transit duration (0 - 50)
Orbital Period
day
The orbital period (0 - 1000)
\(R_\text{p}/R_\text{*}\)
The ratio of the planet radius to the stellar radius (0 - 1)
\(a/R_\text{*}\)
The ratio of the semi-major axis to the stellar radius (0 - 100)
Inclination
deg
The inclination of the orbit (0 - 180)
Eccentricity
The eccentricity of the orbit (0 - 1)
\(\omega \)
deg
The longitude of the periapsis (0 - 360)
\(\lambda_\text{min}\)
\(\mu\)m
The minimum wavelength to use
\(\lambda_\text{max}\)
\(\mu\)m
The maximum wavelength to use
# channels
The number of channels to use (for grisms)

Minimum \(\mu\)
The minimum angle to consider when fitting the LD profile

This can take up to 20 seconds! Please be patient.