This image of globular cluster M3 was composed from 63 one minute exposures made with a ZWO ASI071MC Pro camera and the 8 inch Rowe-Ackerman Schmidt Astrograph, calibrated with a master dark frame only.

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Image acquisition date: 14-Jun-2019
Seeing: average
Transparency: below average

Imaging telescope: 8" f/2 Rowe-Ackerman Schmidt Astrograph
Imaging filter(s): Celestron LP filter
Imaging camera: ZWO ASI071MC Pro
Imaging camera gain: 92
Sensor temperature: -5° C
Anti-dew heater: On

Guiding telescope: 60mm f/4 refractor
Guiding camera: ZWO ASI224MC
Guiding software: PHD2 Guiding

Mount: Atlas EQ-G
Mount control software: EQMOD, Cartes du Ciel

Capture software: Sequence Generator Pro, version 3.0
Sub-exposures: 63 x 60 seconds
Total integration time: 63 minutes
Flat frames: none
Dark frames: none
Image processing software: PixInsight