THE SACRED HEART OF CASSIOPEA (Melotte 15-IC 1805)
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Equipment and exposition:
GSO RC 8"
ATIK 314L with Atik Filter USB wheel ,Astronomik Filters 31,8
Guided with Orion ST 80 with Starshoot Autoguider
25 x 600 in HA
10 x600 in OIII
Green channel created with both (Ha+OIII) to replace SII
Site: Val Troncea,West Alps, Italy
COELUM ASTRONOMIA NOVEMBRE 2010
About this object:
The Heart Nebula, IC 1805, Sh2-190, 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.
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.