Astronomy Specialist



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Testar Australia is a technical assistant dealer for 10 Micron. Our staff has been trained at the 10 Micron factory to provide assistance, repairs and maintenance on their products.


Evolving perfection. The GM2000 HPS II mount, now in the new M2 version, is built for the demanding observer using photographic instruments up to a weight of 50kg (counterweights not included). Movements are driven by two servo brushless motors, with timing belt reduction having zero backlash. Both axes feature a classic worm – wormwheel pairing. The wormwheels are made of bronze (B14), with a diameter of 172mm and 215 teeth, while the worms are made of alloy steel with a diameter of 24mm. The axes are made of 50mm diameter alloy steel for the maximum rigidity.

The electronics are housed in an independent control box which are easily removable. The connections of the mount and keypad feature security lock screws. The mount can be remote controlled by using the included keypad, without connecting an external PC. The keypad is built in order to maintain the maximum readability in all lighting conditions. Both the display and the ergonomic keys, allowing for the use of gloves, feature a red backlight. A heater keeps the display warm for usage below freezing temperatures.

The mount can be controlled by using the most common software packages by connecting it to a PC with the RS-232 serial port or the Ethernet connection, via the 10Micron ASCOM driver or the Meade compatible command protocol. Further, a dedicated software (also included with the mount) can be used to create a “virtual keypad”, precisely replicating the functions of the physical keypad. The RS-232 port can also be used to control an external dome.
This flexibility makes the GM2000 HPS an ideal mount for observatories and remote observing sites. The object database contains many star catalogues and deep-sky objects up to the 16th magnitude. Solar system objects can be tracked so that their motion is compensated with respect to the stars. You may load orbital elements of comets, asteroids and artificial satellites into the mount, so that these objects can be tracked directly by using the keypad (without any external PC).

Pointing is made accurate through the usage of a model containing up to 100 stars, which allows for the correction of the classical polar alignment and conic errors as well as the most important flexure terms of the optical tube. In this way it is possible to obtain a pointing accuracy of up to 20 arcseconds RMS. The same model can be used to obtain the maximum tracking accuracy, compensating also for the atmospheric refraction (depending on the local atmospheric pressure and temperature). A series of auxiliary functions is provided to help the user for a quick alignment of the mount to the celestial pole. You may also save and recover the alignment data of different observing sessions. This function is very useful if you have many instruments in different setups, each one requiring different flexure corrections. Tracking through the meridian, a typical problem with German mounts, is solved to allow for tracking of up to 30° past the meridian (configurable) in both directions. In this way any object can be tracked for at least four hours.

The tracking accuracy makes auto-guiding not necessary for many uses. The absolute encoders on both axes allows to obtain a typical tracking error below 1 arcsecond.


It is possible to auto-guide anyway, using the ST4-compatible port or through the serial/Ethernet connection, with a guide rate configurable from 0.1x to 1x. The guide rate can be automatically corrected for the declination of the target, so that there is no need to recalibrate the auto-guide when observing at different declinations. Among the other functions, you will find the electronically-assisted balance and the ability to park the mount in different user-defined positions.
Designed for field use, the ultraportable version is easily divided into two parts. All electrical connections are made automatically when assembling the mount. The biggest piece has a weight of only 15kg, and in combination with the Centaurus II (21kg) you obtain a winning combination for the mobile observer.

The GM2000 can also be supplied in a special version for very low temperature operations: ask our team if interested.





German Equatorial Mount

Weight (mount)

33 kg - without accessories

Weight, Ultraportable version (mount)

18 kg + 15 kg - without accessories

Instrument payload capacity

50 kg

Latitude range

20° – 70°

Azimuth fine adjustment range

+/− 10°

Counterweight shaft

40 mm diameter, stainless steel, weight 4 kg


50 mm diameter, alloy steel


Pre-loaded tapered roller bearing

Worm wheels

215 teeth, 172 mm diameter, B14 bronze


Diameter 24mm, tempered alloy steel, grinded and lapped

Transmission system

Backlash-free system with timing belt and automatic backlash recovery


2 axes servo brushless

Power supply

24 V DC

Power consumption

~ 0.7 A while tracking
~ 3 A at maximum speed
~ 5 A peak

Go-to speed

Adjustable from 2°/s to 20°/s

Pointing accuracy

< 20” with internal multiple-stars software mapping

Average tracking accuracy

< +/− 1" typical for 15 minutes (< 0.7" RMS)
with internal multiple-stars software mapping and compensation of flexure and polar alignment errors

Security stop

+/− 30° past meridian in r.a. (software)
+/− 45° past meridian in r.a. (mechanical)

Operational temperature range (standard)

- 15° C to + 35° C

Storage temperature range

- 40° C to + 50° C

Special operational temperature range Optional, for very low temperatures (-35°C): see options for more details

Communication ports

RS–232 port; GPS port; auto-guide ST-4 protocol port; Ethernet port


Stars: by name, Bayer designation, Flamsteed designation, Bright Star Catalogue, SAO, HIP, HD, PPM, ADS, GCVS. Deep-sky: M, NGC, IC, PGC ,UGC limited up to mV = 16. Solar system: sun, moon, planets, asteroids, comets, artificial satellites. Equatorial and altazimuth coordinates. User defined objects, fast slewing positions.

Firmware features

User defined mount parking position, 2‑stars and 3‑stars alignment function, up to 100 alignment stars for modeling, correction of polar alignment and orthogonality errors, estimate of average pointing error, storage of multiple pointing models, sidereal, solar and lunar tracking speed adjustable on both axes, declination-based auto-guide speed correction, adjustable horizon height limit, pointing and tracking past meridian, assisted balance adjustment, manual or GPS based time and coordinates setting, dome control via RS-232, configurable atmospheric refraction, network settings, comets and asteroids filter, multi-language interface. Remote assist via Internet connection.

PC control

Remote control via RS-232 or Ethernet; proprietary ASCOM driver or Meade compatible protocol; update of firmware and orbital elements of comets, asteroids and artificial satellites via RS-232 or Ethernet; virtual control panel via RS-232 or Ethernet. Wi-Fi included to control the mount via tablet, smartphone etc.



GM 2000 HPS II Mount – Ultraport version includes:

  • GM2000 HPS II mount with built-in precision absolute axis-encoders
    control box with on-board intelligence (Linux-processor), V.2 – HPS version firmware, stand alone system (no PC required)
  • Professional hand control unit with graphic display and temperature control – 10M5030
  • Cables
  • Counterweight bar
  • Strong transport carton-box with shaped foam – 10M2066
  • WiFi option included.



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