Focal Pointe Observatory
Astrophotography by Bob Franke

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LDN 988

 

Click the image for a higher resolution, annotated, view. (2400 x 1800 1.64 MB) 

 

V1331 Cyg (150% size)

 

Instrument

Takahashi FSQ-106ED @ f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel.  Shown at 2.90 and 9.28 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

9/15/2014 to 10/27/2014 Chino Valley, AZ... with CCDSoft & CCD Commander.

Exposure

Lum

168 min. (11 x 15 min.)  binned 1x1

Red

112 min. (16 x 7 min.)        "

Green

112 min. (16 x 7 min.)        "

Blue

112 min. (16 x 7 min.)        "

Software & Processing Notes

  • CCDSoft, CCDStack, PixInsight and Photoshop CS6.

  • No SDSS stars were available for color balancing, so a standard image-train calibration was used, as determined by eXcalibrator v4.30, and then adjusted for altitude extinction.

  • CCDStack for sub exposure calibration.

  • PixInsight processing included sub exposure registration and integration, the RGB combination and the initial non-linear stretching with HistogramTransformation & MaskedStretch.

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

  • Noiseware 5, a PhotoShop plug-in.

Comment

Shown rotated 90 clockwise, with North to the right.

This region, in the constellation Cygnus, features several dark and bright nebulae as catalogued by Beverly Lynds. Other objects include Sh2-121 and the interesting young star V1331 Cyg with its associated dust rings.