​SRO Seeing & Darkness Data
For updated seeing data please refresh the page.

Alcor Seeing Monitor:  Nightly Mean Seeing
Starts at 8:30 PM.  During the day this number represents the mean seeing for the previous night.  During the evening, this number represents the current mean seeing for that evening.

Alcor Seeing Monitor (Cyclope)
Starts when the Sun is 5 degrees below the horizon.

Current Mean Seeing and Graphic

Alcor Flux Monitor
The flux reading is a measure of sky transparency utilizing the Alcor Cyclope Seeing Monitor

SBIG Seeing Monitor
Starting Time Variable: Approximately 7:00 PM (winter) and 8:00 PM (summer)

Sky Quality (Darkness and Lunar Phase)
Unihedron Sky Quality Meter LE utilizing Knightware Software

Moon Glow ASC