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Pleiades, Exmoor, 2018
The light of the famous star cluster Pleiades (M45), the Seven Ancient Greek Sisters, travelled 400 light years and highlighted unrelated cosmic dust that spans over 20 light years to reach my camera sensor under the pristine dark skies of Exmoor.
Tech Card
Date / Location
10th November 2018, Exmoor, GMT+0, United Kingdom, TEMP: 8C, HUM: 96%, Bortle Class 3 ~SGM: 21.75 mag./arc sec2
Equipment
Camera: Nikon D810A
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
14 bit RAW (NEF)
Exposure time per image / number of composities and sensitivity
ISO 1600, 1 x 180" subs
ISO 3200, 20 x 180" subs
Total Integration Time
1hr 3mins
Calibration Frames
23 Darks, 23 Bias, 25 Flats
Software
PixInsight 1.8 Core
Photoshop