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Contains:  IC 1805
Getting plate-solving status, please wait...
IC1805 - HaOIII-RGB, 


            Thomas Richter


Technical card

Resolution: 3278x2424

Dates:Sept. 11, 2016Sept. 21, 2016Sept. 25, 2016

Baader B 1.25'' CCD Filter: 10x300" -20C bin 1x1
Baader G 1.25'' CCD Filter: 10x300" -20C bin 1x1
Baader Ha 2" 7nm: 26x600" -20C bin 1x1
Baader Planetarium O3 1.25" 8.5nm: 23x600" -20C bin 1x1
Baader R 1.25'' CCD Filter: 10x300" -20C bin 1x1

Integration: 10.7 hours

Flats: ~20

Bias: ~100

Avg. Moon age: 17.87 days

Avg. Moon phase: 56.27%

Temperature: 10.50 job: 1339549

RA center: 38.993 degrees

DEC center: 61.466 degrees

Pixel scale: 1.220 arcsec/pixel

Orientation: 136.120 degrees

Field radius: 0.691 degrees

Locations: Nürnberg, Nürnberg, Bayern, Germany


Rev. A-C: This is a bicolor version of the most interesting part of the Heart Nebula.
Rev. D: Bicolor-Image combined with RGB Stars
Rev. E: another combination of Bicolor and RGB

Thanks for watching !

Object description ( :

The Heart Nebula, IC 1805, Sharpless 2-190, 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 by plasma 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.

Visually, the galaxies Maffei 1 and Maffei 2 are nearby, although light extinction from the Milky Way makes them difficult to find and once they are found, difficult to define features within. Once thought to be part of our own Local Group, they are now known to be part of another nearby group, the IC 342/Maffei Group, the closest galaxy group to our own.

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.



Thomas Richter
License: None (All rights reserved)


  • IC1805 - HaOIII-RGB, 


            Thomas Richter
  • IC1805 - HaOIII-RGB, 


            Thomas Richter
  • IC1805 - HaOIII-RGB, 


            Thomas Richter
  • IC1805 - HaOIII-RGB, 


            Thomas Richter
  • Final
    IC1805 - HaOIII-RGB, 


            Thomas Richter

Sky plot

Sky plot


IC1805 - HaOIII-RGB, 


            Thomas Richter