The Heart Nebula, IC 1805, Sh2-190, lies some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. This is an emission nebula showing glowing gas and darker dust lanes. The nebula is formed byplasma of ionized hydrogen and free electrons.

The very brightest part of this nebula (the knot at the right) is separately classified as NGC 896, because it was the first part of this nebula to be discovered.

The nebula’s intense red output and its configuration are driven by the radiation emanating from a small group of stars near the nebula’s center. This open cluster of stars known as 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. The cluster used to contain a microquasar that was expelled millions of years ago.

Imaging telescopes or lenses: Canon FD 300mm 2.8
Imaging cameras: SBIG STF-8300M
Mounts: ASA DDM60Pro
Software: PixInsight, photoshop, MaxPilote
Filters: Astrodon SII 5nm, Astrodon Ha 5nm, Astrodon OIII 5nm
Resolution: 1600×1204
Dates: Nov. 2, 2014
Frames:
Astrodon Ha 5nm: 18×1200″ bin 1×1
Astrodon OIII 5nm: 9×1200″ bin 1×1
Astrodon SII 5nm: 9×1200″ bin 1×1
Integration: 12.0 hours
Avg. Moon age: 9.41 days
Avg. Moon phase: 70.94%

Аuthor: Jyrki

Astrophotography of the day of SPONLI, 07.11.2014