Planetary Transit Calculator
Calculate transit depth, duration, probability, and timing for exoplanet transits.
Inputs
Solar Radii
Earth Radii
days
AU
degrees
Results
Transit Depth
0.000001
Transit Duration
12.98 hours
Transit Probability
0.00465%
Impact Parameter0
Ingress Duration0.0005 days
Orbital Velocity29,785.68 m/s
How to Use This Calculator
- Enter Star Radius (solar radii) and Planet Radius (Earth radii) for the target system.
- Enter Orbital Period (days) and Semi-Major Axis (AU) — use Kepler's law if only one is known.
- Set Orbital Inclination (°): 90° is perfectly edge-on; values below 90° reduce transit probability.
- Read Transit Depth (fraction of stellar flux dimming) — a 1% dip means the planet covers 1% of the star's disk.
- Use Transit Duration (hours) to plan observation windows and Transit Probability to assess detection likelihood.
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Formula
Transit Depth = (R_planet / R_star)²Related Calculators
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