IC 1805 / Melotte 15

Ha 266 min.
ASA 16" RC f/8
ASA DDM 100
ZWO ASI 6200MM Pro

Constellation Cassiopeia
Ra 02h 32m 50s
Dec 61° 28´ 15"

IC 1805 or Melotte 15 is an open cluster in the center of the Heart Nebula. It contains several stars of spectral type O, that are responsible for ionizing the hydrogen in the nebula. This cluster consists of very young, blue, hot supergiant stars with a mass almost 50 times that of the sun, as well as many faint stars far less massive than our sun.

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