​SRO Seeing & Darkness Data

Note:  The Creek Fire is no longer active in our area and is significantly contained (78% as of November 15th).  Currently, there is no significant ash in our region.  Therefore the observatories are opening almost every night.  The Creek fire was substantial, it is the largest single-incident fire in California history and the 4th largest in California overall, behind "complex" (multi-incident) fires, according to Cal Fire. Complete containment of the Creek Fire is expected by November 30th.

For updated seeing data please refresh the page.

SBIG Seeing Monitor
Starts at 9:30 PM

Alcor Seeing Monitor (Cyclope)
Starts at 9:30 PM

Alcor Flux Monitor
The flux reading is a measure of sky transparency utilizing the Alcor Cyclope Seeing Monitor
​ Starts at 9:30 PM

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

Moon Glow ASC