Super widefield of M52, Bubble Nebula and Nova Cas 2021

Cassiopeia

A super widefield astrophoto I took in a bright & short moonless July night (2021). This is just 12 mins of unguided data! I used a reduced FSQ85-ED and a D180A. Can you spot the bright supernova Nova Cas 2021 below the star cluster M52? It was really bright that night and I couldn't resist and after the short imaging session I bought out my 100mm fluorite refractor and my widest 40mm eyepiece to observe it. The seeing was phenomenal that night.

Tech Card

Date / Location

16th July 2021, Warwickshire, GMT+0, United Kingdom, TEMP: 20C, Bortle Class 4 ~SGM: 21.20 mag./arc sec2

Equipment

Camera: Nikon D810A

Imaging Telescope: Takahashi FSQ-85ED

Correcting Lens: Takahashi Reducer-QE 0.73x (composite focal length at 328mm and focal ratio at f/3.8)

Mount: iOptron CEM25EC

Image Quality

14 bit RAW (NEF)

Exposure time per image / number of composities and sensitivity

ISO 1250, 4 x 180" subs

Total Integration Time

12mins

Calibration Frames

16 Darks, 16 Bias, 24 Flats

Software

PixInsight 1.8.8-8

Lightroom

Photoshop