Focal Pointe Observatory
Astrophotography by Bob Franke

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Sh2-98 Nebula

 

Click the image for a ~ 50% size view. (1800 x 1200 - 0.79 MB)

Instrument

12.5" RCOS @ ~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at 1.26 and 3.03 arcsec/pixel.

Mount

Paramount ME

Camera

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

Acquisition Data

7/7/2015 to 7/28/2015  Chino Valley, AZ with CCD Commander & CCDSoft. 

Exposure

Ha

 360 min. (24 x 15 min. each)  binned 1x1

Click here for the RGB color image.

Software

  • CCDSoft, PixInsight & Photoshop CS6.

  • CCDStack to calibrate the sub exposures.

  • PixInsight to register, normalize, data reject, combine the sub exposures, gradient removal, non-linear stretching with HistogramTransformation and ACDNR for noise reduction..

  • PhotoShop for the final touch up.

Comment

North is to the top.

Sh2-98 is a faint emission nebula, in the constellation of Cygnus, at a distance of about 11,700 light-years.