• The NOVA120 offers a cutting edge direct drive imaging platform that comprises extremely high rigidity, high quality and repeatability. Professional observatory grade mount for the highest precision imaging.
    • Zero Maintenance : No gears,no worms and no belts : no maintenance, no mechanical wear, no summer-winter gear and worm tuning
    • Extremely High Resolution Absolute Encoders: 67 million encoders on each axis
    • No Periodic Error
    • High speed Slewing ( up to 20°/sec)
    • Long unguided exposures with higher focal lengths is possible
    • No Autoguiding with the correct models and stiff gear.
    • Mechanical Brakes: Do not fret loss of power if unbalanced
    • Large access shafts through the mounts permits a larger number of cables can be routed through the mount to negate cable snags
    • Can’t Get Lost: Start the mount in any position, it knows immediately its location in space due to the extremely high absolute positioning
    The NOVA120 is the latest offering if great reliability, longevity and extreme accuracy


Payload weight up to 150 kg
RA-DEC axis diameter Ø120 mm hollow shafts
Weight without couterweights 90 kg
Mount type German equatorial
Bearings 4 preloaded 160/120 mm high accuracy ball bearings
Size 750x750x400 mm
Operating voltage 220V / 110V AC  up to 120W axis
Motors operating voltage 24 V
Motors One high torque frame less brusless motor per axis
Encoders 67 millions steps per rotation (26 bits), Absolute encoders
0.019 arsec per encoder step
Absolute positionning on start up Yes
Axis brake On both axis, magnetic brakes when power drops
Latitude range 0 to 60°, for other latitudes, contact us
Moving speed 20°/sec
Pointing accuracy (with Pointing model) downto 5 arcsec rms
Tracking accuracy Better than 0.25 arcsec in 5 min
Azimuth adjustements +/- 15 °
Software Windows 7 to 10, ASCOM compliant software
PRISM Software
Pointing model Included
Counterweights 5 or 10 kg counterweights
Computer interface Ethernet


Weight 210 lbs

1 review for Alcor System NOVA120 – Direct-Drive Professional Telescope Mount

  1. Eric Barbotin

    A couple of years ago, I wanted to replace my old VMA200 mount with something more modern.
    While visiting the Paris Astronomy show (RCE 2012) I noticed the Nova120. At that time, it was a brand new offering that I have not seen before, hence my hesitation to purchase
    I wanted to purchase a E.U product to guarantee the quality and ease of access to support in my own language. I checked the forums and heard nothing but good things about the Nova120 so I decided to purchase it.

    I have used enough astronomical instruments in the last 30 years to know what great quality is. The Nova120 coupled with the PRISM v10 and a CDK20 (508 mm) helped me pull off 900s unguided images with great ease. (Raw FITS File here). Payload of this setup is about 80 kg (160 lb).

    The dizzying slew speeds, excellent accuracy and painless tracking makes this hobby easy and enjoyable again.
    After using this setup for a year and a half, the only problem I had was rebalacing the gear after changing scopes. The superb electronics and software included make this tasks even more easier that just eyeballing the scope for movement due to unbalance.

    You can very easily watch the motor consumption and know where the unbalance is….that easy. I have so much data that it is becoming difficult yo keep up.
    I have absolutely zero regrets, this purchase has made everything easier: No summer/winter worm-gear adjustments, no guiding… just start imaging night after night after night.

    Eric Barbotin

    (0) (0)
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