iTelescope - T11 - Deep Space - Utah

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Location Information

Observatory: Utah Desert Remote Observatory at Great Basin Desert, Beryl Junction, Utah, USA
MPC: U94

Telescope:  0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer

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

Minimum Target Elevation: 15º all azimuths except noted. 19º elevation for azimuths 240-300º. 

N 37° 44’ 16"    Decimal: 37.7378 North

W 113° 41’ 51"  Decimal: -113.6975 West

Elevation: 1,570 meters / 5150 ft

Operational Notes

Deep Field. Hybrid Missions. Typically used for Photometry and Imaging. FITS and TIF file formats. Dark Frame calibration data is available for  60, 120, 180, 300, 600  second exposures. Binx1 - Binx2. Recommended Maximum Exposure 600 seconds.  Raw data can be found at

  • T11 is fitted with a 0.66 Focal reducer.
  • The Planewave Ascension 200HR mount is so accurate whilst tracking that iTelescope Admin have disabled active guidance, with a corresponding decrease in session setup time when imaging.
  • T11 is a DEEP field telescope and its mission can be both an excellent imaging platform or do powerful science with photometrics.
  • T11 is a major photon hunting science machine on the iTelescope network. This instrument can deliver pin-sharp images during 300-600 second unguided exposures, reaching magnitudes as low as 21.5 without too much effort.

Instrument Package

CCD:  FLI ProLine PL11002M CCD camera

QE: 51% Peak

Full Well:  ~60,000e-  Anti Blooming Gate (ABG)

Dark Current:   <.03 e-/pixel/sec. @ -35º C

Pixel Size:  9um Square

Resolution:  0.81 arc-secs/pixel

Sensor:  Frontlit 

Cooling:  Set to -30ºC default 

Array:  4008 by 2672 (10.7 Megapixels) 

FOV:      36.2 x 54.3 arc-mins

Filters: AstroDon - Luminance, Red, Green, Blue. 3nm Ha3_50R, Sii3_50R, Oiii_50R. U, B, V, R, I

Position Angle: 186.9º

Telescope Optics

OTA: Planewave 20" (0.51m) CDK

Optical Design: Corrected Dall-Kirkham Astrograph

Aperture: 510mm

Focal Length: 2280mm (0.66 Focal Reducer Fitted)

F/Ratio: f/4.5

Guiding: Active Guiding Disabled 

Mount: Planewave Ascension 200HR


Astrometrica - T11 Config FIle

T11 Transformation Coefficients

Tub= 1.086 ; standard deviation=.009

Tbv= 1.106 ; standard deviation= .018
Tvr= 1.057 ; standard deviation= .017
Tri= 0.933 ; standard deviation= .006
Tu= 0.103 ; standard deviation= .014
Tb= 0.017 ; standard deviation= .006
Tv= -0.133 ; standard deviation= .010
Tr= -0.211 ; standard deviation= .019

These use the definitions as follows with lower case being instrument magnitudes and upper case being reference magnitudes of NGC 7790 from Arne Henden at

Tu= slope of (U-u)/(U-B)
Tb= slope of (B-b)/(B-V)
Tv= slope of (V-v)/(V-R)
Tr= slope of (R-r)/(R-I)

Tij=1 / slope of (i-j)/(I-J)