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

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