1.65 m Telescope

1.65 m Telescope

1.65 m Telescope

1.65 m Telescope

165 m. telescope - Photo by Andrius Zigmantas

165 Telescope Follows Stars (C) Tomas Danielkus
Diameter of the primary mirror (sital=cervit) 165 cm
Focal length of the primary mirror 492 cm
Focal ratio of the primary mirror 1:3
Thickness of the primary mirror at the edge 22 cm
Diameter of the central hole 30 cm
Diameter of the secondary mirror 45 cm
Equivalent focal length of the sistem 1968 cm
Focal ratio of the Ritchey-Chretien system 1:12
Field diameter of Richey - Chrétien 20 cm=35'
Field diameter 30 mm
Focus offset from the surface of the primary mirror 72 cm
Image scale 1 cm=1,75'
Focal reducer from from 1/12 to 1/4 scale 1 cm = 5.25'

Manuals User's guide for Molėtai observatory 1,65 m and Maksutov telescopes

0.51 m Maksutov telescope

0.51 m Maksutov telescope house

0.51 m Maksutov telescope I

0.51 m Maksutov telescope II
Diameter of the primary mirror 51 cm
Focal length of the primary mirror 120 cm
Thickness of the primary mirror at the edge 7.2 cm
Diameter of the meniscus 35 cm
Focal ratio of the system 1:3.5
Dimensions of the Newtonian mirror 14.8 x 21.3 cm
Dimensions of the LN CCD field 1.2 x 1.1 sq. deg.
Guiding telescope diameter 14 cm
Focal length of the guiding telescope 130 cm
Viewfinder (AT-1) diameter 5 cm
Filed of view 11 deg.
Year of manufacturing 1962
Mounted at Molėtai observatory 1975

Manuals User's guide for Molėtai observatory 1,65 m and Maksutov telescopes The 35/51 cm telescope of the Maksutov system (ACT-452)

Parameter Value
Aperture 800 mm
Focal Length 5440 mm (f/6.8)
Secondary Mirror Diameter 300 mm
Field of View 0.5 degrees
Mount Type Alt-Az
Focus Nasmyth
Weight 1500 kg
Pointing Accuracy < 2 arcseconds
Tracking Accuracy < 0.5 arcseconds
Control System Fully automated

0.63 m Cassegrain Telescope - Photo by Andrius Zigmantas

0.63 m Cassegrain Telescope Dome
Diameter of the primary mirror 62.8 cm
Focal length of the primary mirror 303 cm
Focal ratio of the primary mirror 1:4.9
Thickness of the primary mirror at the edge 10 cm
Diameter of the central hole 10.4 cm
Diameter of the Cassegrain mirror 17.2 cm
Equivalent focal length of the system 1000 cm
Focal ratio of the Cassegrain system 1:16
Offset of the focus from the surface of the primary mirror 25 cm
Image scale 1 cm=3.4'
Diameter of the viewfinder 14 cm
Focal length of the viewfinder 225 cm