California Nebula (HaRGB), 2019

Date / Location

26th & 27th February 2019, Bedworth, GMT+0, United Kingdom, Bortle Class 5 ~SGM: 19.57 mag./arc sec2

Equipment

Camera: ZWO ASI 1600MM-PRO USB 3.0 Mono (Type CMOS)

Sensor Cooling Temperature: -15C

Filters: 1.25 5nm Astrodon Ha, 1.25 Astrodon LRGB Gen2 E-Series Tru-Balance Red, 1.25 Astrodon LRGB Gen2 E-Series Tru-Balance Green, 1.25 Astrodon LRGB Gen2 E-Series Tru-Balance Blue

Imaging Telescope: Takahashi FS-60CB

Correcting Lens: Takahashi Reducer 0.72x (composite focal length at 264mm and focal ratio at f/4.9)

Mount: iOptron CEM25EC

Image Quality

12Bit ADC (FITS)

Exposure time per image / number of composites and sensitivity

25 x 180 Ha subs (Unity Gain, Gain: 139, Offset: 21, Binning 1x1)

13 x 180 Red subs (Unity Gain, Gain: 139, Offset: 21, Binning 1x1)

9 x 180 Green subs (Unity Gain, Gain: 139, Offset: 21, Binning 1x1)

9 x 180 Blue subs (Unity Gain, Gain: 139, Offset: 21, Binning 1x1)

Total Integration Time

2hrs 48mins

Calibration Frames

20 Darks, 20 Flats (Ha flat for Ha, and Luminance flat for RGB

Software

PixInsight 1.8 Core

Photoshop

SharpCap