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Orion Nebula, Exmoor, 2018

I imaged this from the truly dark skies of Exmoor, Europe's 1st international dark sky reserve. 30 mins total integration time during a few clear, free of clouds, early morning hours (04:22 - 04:54). This image was published on BBC's Sky at Night magazine (January 2019).

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, 9 x 180" subs, 1 x 120" sub

Total Integration Time

29mins

Calibration Frames

23 Darks, 23 Bias, 25 Flats

Software

PixInsight 1.8 Core

Photoshop