IC 1805, The Heart Nebula in Cassiopeia

IC 1805 is a cloud of ionized hydrogen 7,500 light years away. Some of the stars in the center of the cluster are nearly 50 times the mass of the sun. These rare O4 and O5 class stars are quite bright, but emit most of their light in ultraviolet wavelengths.
Magnitude: 6.5

10/25/14, 10/1/13
Canon T3i
254mm Newtonian, FL 1200mm
178 minutes of exposures at ISO 1600

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