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