7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes.
The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula’s intense red output and its morphology are driven by the radiation emanating from a small group of stars near the nebula’s center. This open cluster of stars, known as Collinder 26 or Melotte 15, contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun’s mass.
Dimmed stars I’ve made with GIMP software.
IC 1805 – Heart Nebula – dimmed stars
- Location: La Palma 12.2020
Equipment: ATIK Horizon RGB,
- Hypergraph TS 420mm f/2,8 OTA PH6,
- CEM25p with small self made tuning,
- Composition: APP,
- Processing: APP + RT + GIMP + add-ons (Linux),
- Total exposure time minus defective light frames: 4h 36min.,
- Lights: 238,
- Calibration frames: Flats, Bias, Darks