🌗 Lunar & Planetary Phase Simulator

Lambertian reflection Real‑time tests: pending…

Preset

Body

Date / Time

Link phase to date Date/Time (UTC)

When linked, the simulator computes orbital phase from the selected date using real periods (Moon synodic, Venus/Mercury approximate inferior-planet cycle, exoplanet orbital period).

Geometry

Orbital phase (0–1) Inclination i (°) Eccentricity e Arg. of periastron ω (°)

Photometry

Geometric albedo A_g (R_p/a)

Orientation

Position angle (°) Observer latitude (visual twist)

Controls

Tip: switch to Custom Exoplanet to see the phase curve update live.

Noise (Phase Curve)

σ (relative)

Readouts

Illuminated fraction k = —
Phase angle α = —°
Reflected flux Φ(α) = — (Lambert phase fn)
Bright‑limb PA ≈ —°

Disk Renderer

Crescent → Gibbous → Full (orientation set by position angle)

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Phase Curve (Reflected Light)

Normalized reflected flux vs phase angle (0 → π)