IC 1805 - Heart Nebula

Show astrometry data

IC 1805, an emission nebula approximately 7,500 light years from Earth in the constellation Cassiopeia, is named the Heart Nebula due to its heart shaped appearance.  The open star cluster Melotte 15 lies in the middle of the heart. The nebula is part of a large star forming complex in the Perseus arm of the Milky Way galaxy. The bright knot at the lower right (which some might liken to a male body part) is separately classified as NGC 896, and was the first part of IC 1805 to be discovered.

Comprising mostly glowing hydrogen, this nebula would appear red if imaged in LRGB. We have imaged it using narrowband filters, mapping Sulfur 2, Hydrogen Alpha and Oxygen 3 to R, G and B respectively to reveal great detail in the Hubble palette. 76 individual exposures totalling more than 25 hours were shot from the dark skies of West Virginia. Image processed using PixInsight and Photoshop.

Data collected in West Virginia using our jointly owned Astrophysics AP 305 f/3.8 scope, in collaboration with:

John Kasianowicz, Mike Selby, Stefan Schmidt and Andy Chatman

Image processing: Andy Chatman


Object details

Nebula in Cassiopeia

Right Ascension: 02h 33m 22s

Declination: +61° 26′ 36″

Magnitude: 6.5

Moon Age Average: 9.37 days

Moon Phase Average: 45.76 %

Imaging Setup


West Virginia, USA

Sep 20, 2017, Sep 21, 2017, Sep 24, 2017, Sep 27, 2017, Sep 29, 2017, Oct 1, 2017, Oct 2, 2017, Oct 3, 2017, Oct 4, 2017, Nov 23, 2017 and Nov 24, 2017
Astrophysics AP 305
Focal Length:
1159 mm
Astrophysics 1600GTO
FLI ML 09000
Image Scale:
2.14 arcseconds/pixel
Imaging Software:

Maxim DL 6

Processing Software:

Adobe Photoshop

PixInsight 1.8

Exposure Detail

Filter Filter Brand Bin Qty Exposure
Ha Astrodon 1x 18 1200
OIII Astrodon 1x 21 1200
S2 Astrodon 1x 37 1200

Total Exposure Time

25 hours, 20 minutes

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