iTelescope - T20 - Wide Field - New Mexico

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Location Information

Observatory:   New Mexico Skies at Mayhill, New Mexico - MPC H06

Telescope:  0.1-m f/5.0 astrograph + CCD

Timezone:  UTC Minus 7:00. Daylight savings time is observed 

Minimum Target Elevation: Approx 15-25 Degrees in East, West & South.  Very Limited to the North NE & NW due to observatory roof in roll back position. Approx 60 degrees Minimum Altitude.

N 32° 54’    Decimal: 32.9 North

W 105° 31’ Decimal: 105.5 West

Elevation: 2,225 metres (7,298 ft)

Operational Notes

Very Wide Field Telescope. Typically used for Wide Field RGB / Narrowband Imaging, but also carries a Photometric V filter. FITS and TIF file formats. Dark Frame calibration data is available for  60, 120, 180, 300 second exposures. Binx1 - Binx2. Recommended Maximum Exposure 300 seconds.  Raw data can be found at

  • T20 is a great platform for wide angle imaging and can also do valuable science with its photometric V filter. This little Takahashi FSQ gets a lot of use from science users scanning for asteroids and working on variable stars, and nothing can match its very wide field portraits and its performance on the sky's larger extended objects such as large nebula, clusters, bright comets and even catching fast moving Near Earth Objects. 
  • This system is included for use in the Demo Upgrade Package.
  • IMPORTANT NOTES: T20 is externally Guided: Please limit sub-exposure times to 300 seconds or less for best results. We recommend using the 'Dithering' imaging option on T20 to remove any column defects during your post processing.

Instrument Package


QE: 50% Peak

Full Well:  ~50,000e-  Anti Blooming Gate (ABG)

Dark Current:   0.5 e-/pixel/sec. @ 0º C

A/D Gain:  2.2e-/ADU

Pixel Size:  9um Square

Resolution:  3.5 arc-secs/pixel

Sensor:  Frontlit 

Cooling:  Set to -15ºC default 

Array:  4008 by 2672 (10.7 Mega pixels) 

FOV:      155.8 x 233.7 arc-mins

Filters:  LRGB, Ha, SII & OIII and V

Position Angle: 092.7º


Telescope Optics

OTA: Takahashi FSQ-ED 

Optical Design: Petzval Apochromat Astrograph 

Aperture: 106mm (0.1 metre) 

Focal Length: 530mm (0.53 metre) 

F/Ratio: f/5.0 

Guiding: External 

Mount: Paramount PME