#### FORMULA's: Formulas for some of the characteristics that can be derived from a light curve of an exoplanet: 1. **Transit Depth (D):**    - Definition: The percentage of the host star's light that is blocked by the exoplanet during its transit.    - Formula: D = (F₀ - Fₜ) / F₀ * 100    - Where F₀ is the initial brightness of the star and Fₜ is the brightness during the transit. 2. **Planet Radius (Rp):**    - Definition: The radius of the exoplanet.    - Formula: Rp = Rₛ * √(D/100)    - Where Rₛ is the radius of the host star. 3. **Transit Duration (T):**    - Definition: The time taken for the exoplanet to cross in front of its host star.    - Formula: T = (P / π) * arcsin(√((1 + Rp/Rₛ)^2 - b²) / sin(i))    - Where P is the orbital period of the planet, b is the impact parameter, and i is the orbital inclination. 4. **Impact Parameter (b):**    - Definition: A measure of how central the transit is.    - Formula: b = a * cos(i) / Rₛ    - Where a is the semi-major axis of the planet's orbit, and i is the orbital inclination. 5. **Orbital Eccentricity (e):**    - Definition: A measure of how elliptical the planet's orbit is.    - Formula: e = (T₁ - T₂) / (T₁ + T₂)    - Where T₁ and T₂ are the durations of ingress and egress, respectively. 6. **Phase Curve Amplitude:**    - Definition: The difference in brightness between the star's maximum and minimum brightness during one orbit.    - Formula: Amplitude = (F_max - F_min) / F_avg    - Where F_max is the maximum brightness, F_min is the minimum brightness, and F_avg is the average brightness. [[Programma]] [[Overview]]