IC 1805 (Heart Nebula) and Melotte 15

Heart Nebula

Click on image for a zoomable version

Location / Date

Zellerndorf, Oct and Nov 2015

Telescope / Mount / Guiding

ASA 10" Astrograph, ASA 3" Wynne Corrector
ASA DDM60, no Guiding

Camera / Exposure

Canon EOS 500Da mono
Hα 12nm Astronomik Clip-Filter 24 x 20min ISO1600
OIII 12nm Astronomik Clip-Filter 24 x 20min ISO1600
SII 12nm Astronomik Clip-Filter 24 x 20min ISO1600
total exposure time 24h


Theli, Fitswork, PixInsight, Photoshop

The image is in mapped colors: SII = Red, Hα = Green and OIII = Blue
known as Hubble (HST) Palette


IC 1805 (or Melotte 15) is an young open cluster in the middle of a large emission nebula. Due its shape this emission nebula is nicknamed "Heart Nebula" and the term "IC 1805" is often used for the whole Heart Nebula.

Glowing interstellar gas and dark dust clouds forms fantasic shapes in the central region of the Heart Nebula. The clouds are sculpted by stellar winds and radiation from massive hot stars in the nebula's newborn star cluster Melotte 15. About 1.5 million years young, the cluster stars are near the center of this colorful skyscape, along with dark dust clouds in silhouette.

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