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M42 - The Orion Nebula

 

Click the image for a higher resolution view. (1200 x 1600 - 1.07 MB)
 

Instrument

Takahashi FSQ-106ED @ f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel.  Shown at 4.30 and 9.16 arcsec/pixel.

Mount

Losmandy G11 with Gemini L4 v1.0

Camera

SBIG STF-8300M Self Guiding Package w/ mono ST-i, using Baader LRGB filters.

Acquisition Data

12/23/2014 to 2/9/2015 Chino Valley, AZ... with CCDSoft & CCD Commander

Exposure

 Lum 399 min. (57 x 7 min. bin 1x1)

Red

255 min. (17 x 7 min. bin 1x1)

Green

330 min. (22 x 7 min. bin 1x1)

Blue

375 min. (25 x 7 min. bin 1x1)

Nebula Core Exposures

 Lum 15 min. (30 x 30 sec. bin 1x1)

RGB

30 min. (20 x 30 sec. each bin 1x1)

RGB combine ratios were 1.0, 1.21 & 1.41

Software & Processing Notes

  • CCDSoft, CCDStack, PixInsight & Photoshop CS6.

  • A standard image-train calibration was used, as determined by eXcalibrator v4.30, and then adjusted for altitude extinction.

  • CCDStack to calibrate both luminance and color exposures, register the color exposures and creating the two RGB images.

  • PixInsight processing includes registering the luminance exposures and creating the two Lum images.  HDRComposition was use to combine the long and short exposures.  Non-linear stretching was done with HistogramTransformation and MaskedStretch. HDRMultiscaleTransform and LocalHistogramEqualization were used to enhance the detail. 

  • PhotoShop for the LRGB combine & final touch-up.

  • Noiseware 5, a PhotoShop plug-in.

Comment

North is to the top.

The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated south of Orion's Belt. It is one of the brightest nebulae, and is visible to the naked eye. M42 is located at a distance of 1,27076 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across.

Source: Wikipedia