iTelescope - T33 - Medium Deep Field - Imaging - Australia

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Location Information

Observatory: iTelescope.Net at Siding Spring Observatory Australia - MPC Q62

Telescope:  0.4-m f/3.5 reflector + CCD

Timezone:  UTC +10:00 New South Wales, Australia Daylight savings time is observed.

Minimum Target Elevation: Approx 20° EAST; NORTH, 45° WEST, 30° SOUTH

South 31° 16' 24" East 149° 03' 52"  

Elevation: 1122m  MPC Code Q62

Operational Notes

T33 features a large CCD chip with a great FoV. Matched up with the wonderful Paramount PME mount and off axis guidance this telescope will deliver incredable data.  FITS and TIF file formats. Dark Frame calibration data is available for  60, 120, 180, 300, 600, 900 second exposures. Binx1 - Binx2.  Raw data can be found at

  • The CCD is Anti Blooming Gated - ABG.
  • 300s sub exposures are optimal at Binx1 for LRGB data & Narrowband at 300 Binx2, or 600 Binx1 on calm nights.
  • Due to the very fast optical design, a bright moon light may impact some exposures.  Select targets well away from the moon position and use narrowband filters for quality data during bright moon periods.
  • Note: T33 uses a custom made off-axis guiding system. This system is susceptible to winds and gusts due to its large closed tube design. Keep exposures as short as possible for your mission on windy nights of over 8kph near zenith is particularly sensitive to guidance issues.

Instrument Package

CCD: Apogee Aspen CG16070 Class 1 CCD

QE: 48% Peak

Full Well:  > 41k Saturation Exposure (ABG)

Dark Current:  <0.008 e-/pixel/sec. @ -30º C

Pixel Size:  7.4um Square

Resolution:  1.07 arcsec/pixel

Sensor: KAI-16070 ABG

Cooling: -30º C default 

Array:   4864 x 3232 pixels

FOV:  88.3x58.7 arcmin    


Astrodon I-Series: Luminance, Red, Green, Blue

Astrodon 5nm Ha, SII, OIII

Position Angle: 267º

Telescope Optics

OTA: 16" 0.4m Astro Systeme Austria (ASA) 

Optical Design: Fast Newtonian Astrograph 

Aperture: 400mm

Focal Length: 1425mm

F/Ratio: f/3.5 

Guiding: Off-Axis Guiding

Mount: Paramount ME