page_title: Ankara University Observatory
section_title: Telescopes
hierarchical_section_title: Ankara University Observatory / Facilities / Telescopes
caption_attribution_description: Türkçe: AUG T40 Kreiken Teleskobu
context_page_description: The Ankara University Observatory, is a ground-based astronomical observatory operated by the Astronomy and Space Sciences Department at Ankara University's Faculty of Science. Established in 1959 by Dutch astronomer Egbert Adriaan Kreiken in Ahlatlıbel, Ankara. Currently, it consists of nine optical telescopes and a radio telescope, which is currently taken out of service. Old instruments are displayed in a museum at the observatory.
context_section_description: T40 Kreiken telescope
  Diameter: 406 mm (16")
  Focal ratio: f/10
  Focal length: 4,000 mm
  Image scale: 51 arcsec/mm
  Producer: Meade Instruments Corp., California, USA
  Focal plane instruments: Apogee ALTA U47+ CCD camera, 1024x1024 13 micron pixels E2V CCD47-10 back illuminated ccd chip, PC based data acquisition via USB 2.0 port, OPTEC IFW filter wheel (PC controlled), Johnson UBVRI – Strömgren uvbyHbeta – RGB filters, various eye-pieces.
  Named after Egbert Adriaan Kreiken, the founder of the observatory, it is used in general for photoelectric photometry observations on eclipsing binary stars and  variable stars.
  T35 telescope
  Diameter: 356 mm (14")
  Focal ratio: f/10
  Focal length: 3,556 mm
  Image scale: 58 arcsec/mm
  Producer: Meade Instruments
  Focal plane instruments : Apogee ALTA U47+ CCD camera, 1024x1024 13 micron pixels E2V CCD47-10 back illuminated ccd chip, PC based data acquisition via USB 2.0 port, OPTEC IFW filter wheel (PC controlled), Johnson UBVRI – Strömgren uvbyHbeta – RGB filters, various eye-pieces.
  Installed in the former Maksutov Dome ın 2011, the 356mm telescope is used for observation on binary stars and photoelectric effects of variable stars.
  T30 Maksutov telescope
  Diameter: 300 mm
  Focal ratio: f/16
  Focal length: 4,800 mm
  Image scale: 43 arcsec/mm
  Producer : E. Popp Tele-Optik, Zurich, Switzerland
  Focal plane instruments: Optec SSP-5A single channel photoelectric photometer, (containing a Hamamatsu R1414 phototube), standard 1 mm diaphragm, Johnson UBV filters, motorized filter slider, 80386 PC based data acquisition.
  300mm telescope for observation on binary stars and photoelectric effects of variable stars.
  T15 Coudé telescope
  Diameter: 150 mm
  Focal ratio: f/15
  Focal length: 2,250 mm
  Image scale: 92 arcsec/mm
  Producer: ZEISS-Oberkochen, Württemberg, Germany
  Focal plane instruments: Solar projection lens and screen for Sun spot observations, Contarex photo camera, Lyott H-alpha monochromator, various filters and eye-pieces.
  150mm telescope of type Coudé is used for scientific observation of sun spots. Popular and educational public sessions are held also at this telescope.
  Other telescopes
  For popular and educational activities open to public:
  Meade LX200 8"
  Diameter: 203 mm (8")
  Focal ratio: f/10
  Focal length: 2,000 mm
  Producer: Meade Instruments Corp., California
  Meade ETX-125 5"
  Diameter: 127 mm (5")
  Focal ratio: f/15
  Focal length: 1,900 mm
  Image scale: 108 arcsec/mm
  Producer: Meade Instruments
  Focal plane instruments : DSI-2 Color CCD camera
  TAD Bresser RB-60 (Two pieces)
  Diameter: 60 mm
  Focal length: 700 mm
  Producer: Meade Instruments
  Bresser Mars Explorer ST-70
  Diameter: 70
  Focal ratio: f/10
  Focal length: 700
  Producer: Meade Instruments
  Radio telescope
  The radio telescope is not in use anymore.
caption: T40 Kreiken telescope and dome
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