Moonlight calculator
Estimated horizontal moonlight at 23 October 2026 at 21:00 BST: 0.0554 lux.
- Phase
- Waxing Gibbous
- Illumination
- 93.12%
- Lunar age
- 13.173 days
- Phase angle
- 149.63°
- Earth–Moon distance
- 379,527 km
- Brown lunation
- 1284
- Apparent diameter
- 31.79 arcminutes
- Coordinates
- 51.5074°, -0.1278°
- Altitude
- 35.32°
- True-north bearing
- 146.05°
- Right ascension
- 23.950 hours
- Declination
- 1.77°
The estimate uses 0.267 lux for a full Moon at 384,400 km overhead before extinction, scales with inverse-square distance, lunar phase darkening and the sine of altitude, and dims by the chosen extinction. It describes horizontal illumination under clear air, without cloud or terrain.