1.5-meter telescope of Tartu observatory

* 58°15'56.7" North * 26°27'34.9" East *
     

 
The 1.5-meter reflector AZT-12 is the largest optical telescope in Northern Europe. It was manufactured in Leningrad (now Saint Petersburg) by LOMO (Russian: Ленинградское Oптико-Mеханическое Oбъединение, lit. 'Leningrad Optical Mechanical Association') and installed at Tartu Observatory in 1974-1975. The telescope was officially opened for astronomical observations on October 21, 1976. Telescope control system was automated in 2011.

Parameters of the telescope

Main mirror
Diameter
Radius of curvature
Weight
1.5 m 
-10554.69 mm
850 kg
Primary-to-secondary distance
4144.31 mm
Secondary mirror
Diameter
Radius of curvature
Conic value e2
0.36 m 
-2904.57 mm
2.444605   
 
Height of the telescope
Length of the tube
Diameter of the dome
7.26 m
6.5 m
15 m
Primary focus
Focal length
Focal ratio
Field of view
5.28 m
1/3.51  
0.07° 
Cassegrain focus
Focal length
Focal ratio
Field of view
Plate scale
24 m
1/16  
0.34° 
116 μm/''
Coudé focus
Focal length
Focal ratio
Field of view
52.8 m
1/35.2  
0.083° 
Guide
Diameter of objective
Focal length
Magnification   max
                min
Field of view
0.3 m
4 m
x400  
x71  
0.1°- 0.6° 
Finder
Diameter of objective
Focal length
Magnification   max
Field of view
0.1 m
1 m
x18 
2.5° 
Click for larger image
 '

Since mid-80s the main instrument has been the Cassegrain spectrograph ASP-32 (also manufactured by LOMO), which has 10 exchangeable diffraction gratings. At present, the telescope is used mostly for the observations of variable stars by researchers from the Department of Stellar Physics.

 

Contact:

Anna Aret
Tartu Observatory
61602 Tõravere
ESTONIA

Phone: +372 737 4519
e-mail:

Last modified: Wed Oct 9 19:31:10 EEST 2019
Anna Aret,
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