NGC7293 - The Helix Nebula

Planetary Nebula in Aquarius

Uploaded 11/01/09

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 The Helix is one of the largest planetaries in angular extent in the entire sky. Spanning a huge 16 arcminutes for the brightest portions, outer shells add to its size to over half a degree. Bright at an integrated magnitude of 7.5, the central star is 13.5, bright for such an object. Also, the number of background galaxies found here is stunning.

This image combines some hydrogen alpha data into the integrated whole to bring up the fainter background nebulosity. The lovely teal color of the core surrounding the central blue star is stunning. Very close attention was paid to keeping the original RGB colors as close as possible to this final image.

Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: Meade DSI Pro Exposure: Ha + RGB = 60:20:20:20 (RGB Binned 2x2)+60m Ha RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 5.5 arcsec (Maxim DL - 10min subframe), Transparency 8/10 Outside Temperature: 55 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