Crescent Moon visibility
Find sunset, Moon lag, elongation and altitude for an evening crescent at your location, with a practical viewing window.
Evening crescent geometry
- Phase at viewing time
- First Quarter
- Illumination
- 51.34%
- Sunset
- 18 October 2026 at 17:00 UTC
- Moonset
- 18 October 2026 at 22:04 UTC
- After-sunset lag
- 303.5 min
- Viewing time
- 18 October 2026 at 19:15 UTC
- Moon altitude
- 12.86°
- Sun–Moon separation
- 91.06°
- Lunar age
- 8.14 days
- Geometry screen
- Does not meet all three thresholds
The viewing time is sunset plus four-ninths of the Moonset lag. This planner’s geometry screen requires a waxing Moon no more than 25% lit, altitude at least 5°, elongation at least 10° and lag at least 40 minutes. Use a clear, unobstructed western horizon; haze and clouds can hide a crescent even when these thresholds are met.