The Rosette Nebula is about 5000 light-years from Earth and measure roughly 130 light-years in diameter.
The radiation from young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see.
Approximately 2500 young stars lie in this star-forming complex, including a few massive O-type stars, which are primarily responsible for blowing the ionized bubble.
Most of the ongoing star-formation activity is occurring in the dense molecular cloud to the south east of the bubble.
This photograph was taken from my balcony in Vedbæk (Denmark) limited to low declination (max 20°) due balcony roof.
The size of the photograph on the night sky is a little under 3°x2° (approximately equivalent to the outermost joint of the index finger seen at arm’s length) and the resolution is a little under 1 arcsecond per pixel.
If this photograph were to be printed out in full size (11486×7657 px) and full resolution it would be 405.20 x 270.12 cm 🙂
The photograph was pre- and post processed in PixInsight and consists of 95 x 3 minut subframes which were all calibrated with Bias, Darks, Flats to remove any noise and vignetting.
23-01-2021 (3 subframes)
29-01-2021 (40 subframes)
07-02-2021 (52 subframes)
The image capturing equipment used was:
Camera: Canon EOS Ra
Telescope: SkyWatcher 650/130
Mount: SkyWatcher EQ6 R PRO
Filter: Optolong l-eXtreme
Auto guider: Lacerta MGEN 3
Guide scope: Orion 175mm
Coma Corrector (reducing from 650 mm f/5 to 588 mm f/4,5)
Field of view: 2d 59′ 7.5″ x 1d 59′ 24.7″
Resolution: 0.936 arcsec/px