IC 1805

Heart Nebula

The Heart Nebula in the constellation Cassiopeia is a large emission nebula with glowing ionized hydrogen gas and darker dust lanes.


recording data

object IC 1805
date of recording
January 20, 2017
exposure 6 h, H-alpha: 51x200", RGB: 45x250"
telescope Celestron RASA F2.2, TSOptics TS100Q
focal lenght 620mm, 580mm
filter Baader f/2 Highspeed 2" H-Alpha, IDAS LPS D1
cameras ZWO ASI1600mmc, Canon EOS 5Da MKII
guiding 250mm guide scope, MGEN
mount Celestron CGE pro
AstroBin click here


The Heart Nebula (also IC 1805 or Sharpless 2-190) lies about 7,500 light years away from Earth and is located in the Perseus arm of our galaxy in the constellation Cassiopeia. It was discovered by William Herschel in 1787. The Heart Nebula is a large emission nebula with glowing, ionized hydrogen gas and embedded, darker dust lanes. The brightest part of the nebula (the node at the western edge) is separately classified as NGC 896, as it was the first part of the nebula to be discovered.


The intense red of the nebula and its appearance are caused by the radiation of a small group of stars near the center of the nebula. This open cluster of stars, known as Melotte 15, contains a few very bright stars almost 50 times the size of our sun.

Baerenstein Observatory

private observatory
Marcel Drechsler






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