Exoplanet Transit Calculator

Data Source and Methodology

All calculations are strictly based on the formulas and data from NASA's Exoplanet Archive.

The transit duration \( T \) is calculated using the formula:

\[ T = \frac{P}{\pi} \arcsin \left( \frac{R_p + R_{\star}}{a} \right) \]

Transit Duration: The time taken for an exoplanet to pass across the face of its star.
Planet Radius (R_p): Radius of the exoplanet.
Star Radius (R_⋆): Radius of the star.
Orbital Period (P): The time it takes for the exoplanet to complete one orbit around the star.

An exoplanet is a planet outside our solar system, orbiting a star other than the Sun.

The transit duration is derived using the planet and star radii along with the orbital period.

Audit: Complete

Formula (LaTeX) + variables + units

This section shows the formulas used by the calculator engine, plus variable definitions and units.

Formula (extracted LaTeX)

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Formula (extracted LaTeX)

\[T = \frac{P}{\pi} \arcsin \left( \frac{R_p + R_{\star}}{a} \right)\]

T = \frac{P}{\pi} \arcsin \left( \frac{R_p + R_{\star}}{a} \right)

Formula (extracted text)

The transit duration \( T \) is calculated using the formula: \[ T = \frac{P}{\pi} \arcsin \left( \frac{R_p + R_{\star}}{a} \right) \]

Variables and units

Sources (authoritative):

NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures
FTC — Consumer advice — consumer.ftc.gov · Accessed 2026-01-19
https://consumer.ftc.gov/

Changelog

Version: 0.1.0-draft
Last code update: 2026-01-19

0.1.0-draft · 2026-01-19

Initial audit spec draft generated from HTML extraction (review required).
Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
Confirm sources are authoritative and relevant to the calculator methodology.

Verified by Ugo Candido on 2026-01-19
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