Teide Observatory

Stellar Observations Network Group

Ø 100.00 cm
Responsible scientist
Pere Lluís
Pallé Manzano
Owner institution
Operation year

The 1.0m alt-az mounted Cassegrain telescope is manufactured by ASTELCO Systems GmbH. It can slew between objects with a speed of up to 20 º/s and has a pointing accuracy of less than 3'' RMS. The primary mirror is relatively thin, only 5 cm, and is actively controlled based on Shack-Hartmann measurements.

The third mirror can rotate 180º which allows two Nasmyth foci.

Coude Unit:

Iodine Cell

Motor: 3  -  Position: 3

Name: Iodine Cell


Temp. Set: 65°C

Temp. Act: 65.3°C

Filter Wheel

Motor: 1  -  Position: 4

Name: Free

Calibration Mirror

Motor: 4  -  Position: 4

Name: The Sun Fiber


Motor: 6  -  Position: 8

Name: 25 μM

Mirror Slide

Motor: 2  -  Position: 3

Name: Beamsplitter Cube

Spectrograph Focus

Motor: 5
Value: 190306

Thorium-Argon Lamp

Status: Off

Halogen Lamp

Status: Off



Nasmyth Unit:


Angle: 0.0000000

Orientation: 0.0000000

Tracking: Off


Angle 1: 107.5541356

Angle 2: 73.6324026

Tracking: Off

Filter Wheel

Red Position: 4

Red Name: Bessel I Filter

Visible Position: 4

Visible Name: Bessel V Filter

Beam Selector

Position: 1

Name: Red and Visible


SONG stands for Stellar Observations Network Group. Launched in 2006 by astronomers at Aarhus University and the University of Copenhagen, SONG is a Danish-led project dedicated to the design and construction of a global network of small telescopes for the study of stars and planetary systems around stars. The idea was to develop an inexpensive, ultra-modern robotic telescope that would provide maximum scientific impact for the cost and be scientifically unique even before the completion of the entire planned globe-spanning network of eight telescopes.

A prototype of the first telescope, financed by Danish sources, has now been erected and tested at the Teide Observatory on Mount Izaña in Tenerife. At just 1 meter in diameter, the telescope is much smaller than many modern telescope – it is the instrumentation and the possibilities offered by the eventual network that sets SONG apart. The technical equipment, installed in an adjacent shipping container, can all be controlled remotely via an ordinary Internet connection. The facility cost DKK 30 million, significantly less than many of the other new facilities around the world.

Operation time