Rosette Nebula, SHO, 2019

NGC 2237

5,000 light years away from our planet, an open cluster of young and bright suns excite nearby atoms to produce this flowery nebula, the Rosette Nebula.

Tech Card

Date / Location

26th & 27th February, 25th, 28th March 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" 3nm Astrodon OIII, 1.25" 3nm Astrodon SII

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 composities and sensitivity

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

42 x 180" OIII subs (Unity Gain, Gain: 139, Offset: 21, Binning 1x1)

42 x 180" SII subs (Unity Gain, Gain: 139, Offset: 21, Binning 1x1)

Total Integration Time

6hrs 42mins

Calibration Frames

20 Darks, 20 Flats

Software

PixInsight 1.8 Core

Photoshop

SharpCap