Heart Nebula

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Heart Nebula
Emission nebula
H II region
Heart Nebula.jpg
The Heart Nebula captured
using an H-alpha filter.
Observation data: J2000.0 epoch
Right ascension 02h 33m 22s
Declination+61° 26′ 36″
Distance7,500 ly
Apparent magnitude (V)18.3
Apparent dimensions (V)150' x 150'
Physical characteristics
Radius165 ly
Absolute magnitude (V)6.5
DesignationsNGC 896, IC1805, Sh2-190
See also: Lists of nebulae

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. It was discovered by William Herschel on 3 November 1787.[1] This is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes.[2]

The very brightest part of this nebula (the knot at the western edge) 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.[1]


A portion of the nebula can be seen at the right of this image.
Heart Nebula in bi-color H alpha + OIII Mosaic with a 384mm telescope

See also[edit]

External links[edit]


  1. ^ a b "New General Catalog Objects: NGC 850 - 899". cseligman.com. Retrieved 2017-12-19.
  2. ^ "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm". astronomy-mall.

Coordinates: Sky map 02h 33m 00s, +61° 27′ 00″