Digitarium® Alpha 2 Portable Digital Planetarium System
This model has been discontinued. Please see our current models.
See also Digitarium general specifications.
|Maximum Dome Diameter
||Approximately 33 feet/10 meters. Brightness
is the main
issue, since the larger the dome,
the larger the surface area the light from the projector must cover.
||768 pixels across a diameter
|Field of view
||180 degrees, full sky.
|Pixels per degree of sky
|Angle of Projection
|Base Projector Brightness
||3500 Lumens with non-fisheye lens (Provided for comparison purposes with other systems. Actual brightness with a fisheye lens is significantly less due to not projecting the whole video rectangle and differing lens properties. Please contact us if you may be interested in a brighter system.)
||Approximately 900:1 (Actual measured value with fisheye lens and projector in normal contrast mode.)
||Up to 1500 hours on high/2000 hours on low (4000 hours with dimmer long life lamp)
||Some violet color separation is present, however we do not believe that this will distract from your teaching. This is a tradeoff in the interest of an affordable system and has been
improved from the previous model.
||1 TB standard.|
North America: 120VAC, 50/60Hz, 640 Watts
Elsewhere: Contact your local distributor.
||FCC Class A, CE class A (RoHS compliant)|
||Direct power off (fan properly cools down lamp even if the power is cut off), dust filter, sealed optical block, shutter, LAN control and reporting
System: 16 x 16 x 24 inches for storage (40 x 40 x 60 cm),
16 x 16 x 34 inches for use (40 x 40 x 87 cm)
Transit case: 19 x 21 x 31 inches (47.5 x 52.5 x 77.5 cm)
System: 58 pounds (26.4 Kg)
Transit case: 34 pounds (15.5 Kg)
Total: 92 pounds (41.8 Kg)
The transit case has built in wheels and extendable handle for easy transport on flat surfaces.
Product photos may differ slightly from actual models.
In July, our first Beginners' Session using the [Digitarium Alpha] planetarium was a big hit -- it was hard to get people to go outside and look at the REAL stars, although it was a beautiful night.
— Catherine Koehler, Battle Point Astronomical Association, Bainbridge Island, WA