|H II region|
|Observation data: J2000.0 epoch|
|Right ascension||02h 33m 22s|
|Declination||+61° 26′ 36″|
|Apparent magnitude (V)||18.3|
|Apparent dimensions (V)||150' x 150'|
|Absolute magnitude (V)||6.5|
|Designations||NGC 896, IC1805, Sh2-190|
The Heart Nebula, IC 1805, Sharpless 2-190, is some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787. 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.
- "New General Catalog Objects: NGC 850 - 899". cseligman.com. Retrieved 2017-12-19.
- "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm". astronomy-mall.
|Wikimedia Commons has media related to IC 1805.|
- Heart Nebula Data download & Processing Guide
- Heart Nebula at Atlas of the Universe
- NASA Astronomy Picture of the Day: Heart Nebula (14 February 2009)