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Astrophotography by Bob Franke

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NGC 7129

 

Click the image for a 75% size wide field view. (2250 x 1500 - 1.59 MB)

Instrument

12.5" RCOS @ ~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at  0.85 and 1.70 arcsec/pixel.

Mount

Paramount ME

Camera

SBIG STL-11000 w/ FW8 filter wheel & AstroDon 6nm Ha and Gen-2 LRGB filters.

Acquisition Data

9/21/2019 to 9/16/2020 Chino Valley, AZ. with CCD Commander & TheSkyX.  AOL guided

Exposure

Lum

 375 min (25 x 15 min. each) Bin 1x1

RGB

 675 min (18 x 15 min. each) Bin 1x1

Ha

 870 min (29 x 30 min. each) Bin 1x1

Software & Processing Notes

 

  • TheSkyX, PixInsight, Photoshop CS6.

  • eXcalibrator v6.2 for (g:r),(b:r) color balancing, using 509 stars from the Pan-STARRS database.

  • CCDBand-Aid to repair KAI-11000M vertical bars.

  • CCDStack to calibrate the sub exposures.

  • PixInsight processing includes CosmeticCorrection,  data  rejection, mean combine the sub-exposures, MureDenoise, create the LRGB image, gradient removal and non-linear stretching with HistogramTransformation, BackgroundNeutralization and StarNet to create a star mask.

  • PhotoShop for additional background neutralization, adding the Ha data, local contrast and color saturation and JPEG creation.

Comment

 

The nebula is shown rotated 70 counter clockwise.

NGC 7129 is a reflection nebula located 3,300 light years away in the constellation Cepheus. A young open cluster is responsible for illuminating the surrounding nebula. A recent survey indicates the cluster contains more than 130 stars less than 1 million years old.
Source: Wikipedia