Mel 15/IC1805

Open Cluster with nebulosity in Cassiopiea

Uploaded 12/5/08

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This magnificent field is centered on the large open cluster Mel 15, also known as CR26 in Cassiopeia. This is the cluster in the center of the giant "Heart Nebula". The cluster is a bright 6.5 magnitude, and 25 arcminutes in size. 40 cluster members are listed in this splashy group. Enveloping this gem is the large nebulosity IC1805. The real attraction here is the nebulosity contains abundant dark nebula and bright shock front details in the vicinity of this cluster and makes for a very dynamic field. Also note the color change across the nebula. The core is more pinkish than the redder outlying nebulosity. For a wide field image of the area, click here.
Instrument: 12.5" f/5 Home made Newtonian Mount: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Water Cooling Guider: Meade DSI Pro w/Lumicon Newt Easy Guider Exposure: Ha^RGB = 90:20:20:20 AstroDon RGB Combine Ratio: 1: 1.05: 1.2 Location: Payson, Arizona, Elevation: 5150 ft. Sky: Seeing FWHM = 8 arcsec (Maxim DL - 10min subframe), Transparency 7/10 Outside Temperature: 35 F CCD Temperature: -30 C Image Processing Tools: Maxim DL: Calibration, deblooming (Starizona Debloomer), aligning, stacking Gralaks Sigma: Stacking PixInsight: Curves, Deconvolution, noise reduction Photoshop CS2: Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS