Manufacturing the Gold Standard in Observatory Domes
Built to last. Trusted worldwide.
Dome Sizes
Sizing options to fit your needs.
Model R
8’ to 16’6” diameter
Compact, efficient, and ideal for personal observatories, schools, and smaller research setups.
Available Sizes:
8’ | 10’6” | 12’6” | 14’6” | 16’6”
Model M
18’6” to 30’6” diameter
Spacious, reinforced, and built for durability. Popular among institutions, commercial facilities, and larger telescope installations.
Available Sizes:
18’6” | 20’6” | 22’6” | 24’6” | 26’6” | 28’6” | 30’6”
Experience
A dome that does the job right.
Engineering
Each Ash-Dome is precision-engineered from Galvalume® steel, offering unmatched durability and performance in the harshest environments. Designed to rotate smoothly and reliably for decades, it’s the gold standard for observatories worldwide.
Access
Our classic slit-style aperture and motorized shutter system provide secure, weather-tight protection with intuitive control—enabling fast, accurate sky access when timing matters most.
Size & Fit
With 15 standard diameters ranging from 8’ to 36’-6”, Ash-Domes meet a wide range of institutional, educational, and private observatory needs—ready to house anything from small refractors to large research-class instruments.
Legacy
Built in the USA since the 1960s, Ash-Domes have stood atop mountaintops, deserts, and campuses across the globe. When your mission requires absolute reliability, an Ash-Dome is the trusted name to protect your equipment.
Design
Form That Follows Function.
Type A – Horizon-Blocking Shutter
Ideal for locations with obstructed horizons or light pollution. The lower door can remain down to act as a windscreen and light shield or be latched to the upper door and raised when full horizon access is needed.
Type B – Drop-Out Shutter
Best for frequent horizon viewing. The drop-out section opens fully, offering a clear aperture from 0° to 105°—perfect for tracking objects from horizon to zenith and back. The lower shutter can remain closed to reduce stray light when needed.