Heart Nebula (IC 1805) HOO with RGB stars (Massimo Di Fusco)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD14794 · HD14817 · HD15069 · HD15238 · HD15239 · HD15250 · HD15382 · HD15522 · HD15557 · HD15558 · HD15570 · HD15629 · HD15665 · HD15785 · HD15851 · HD16183 · HD236966 · IC 1795 · IC 1805 · LBN 645 · LBN 646 · LBN 647 · LBN 648 · LBN 650 · LBN 654 · LBN 655 · LBN 656 · LBN 657 · LDN 1359 · LDN 1360 · And 15 more.

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Heart Nebula (IC 1805) HOO with RGB stars

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Heart Nebula (IC 1805) HOO with RGB stars

The Heart Nebula (also known as the Running dog nebula and catalogued as IC 1805 or S2-190) is an emission nebula in the constellation Cassiopeia 7500 light years away from Earth in the Perseus Arm of the Milky Way. It shows principally glowing ionized hydrogen gas and darker dust lanes but is also made up of ionised oxygen and sulfur gasses, responsible for the rich blue and orange colours seen in narrowband images.
The brightest part of the nebula (Fish Head Nebula, below in my picture) 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. The heart shape of the nebula is driven by stellar winds from these hot stars in its core.

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Status	Advanced success
Started	...
Astrometry.net job	6276755
PixInsight job	P2AQP2OF67A415Z8B2174ORO39WDRXHZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h31m49s.66
RA (top/left)	02h38m00s.41
RA (top/right)	02h40m52s.85
RA (bottom/right)	02h25m05s.15
RA (bottom/left)	02h23m24s.63

Dec (center)	+61°25′23″.5
Dec (top/left)	+60°06′04″.4
Dec (top/right)	+62°31′10″.3
Dec (bottom/right)	+62°43′55″.7
Dec (bottom/left)	+60°17′46″.8

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Heart Nebula (IC 1805) HOO with RGB stars

Heart Nebula (IC 1805) HOO with RGB stars

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Heart Nebula (IC 1805) HOO with RGB stars

Heart Nebula (IC 1805) HOO with RGB stars

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