Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Extremely wide field
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Sharpless 171 / NGC  7822 (H-alpha), 


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Sharpless 171 / NGC 7822 (H-alpha)

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Imaging telescopes or lenses: Rokinon 135mm f/2.0 ED UMC Telephoto Rokinon 135mm

Imaging cameras: QSI583wsg5

Mounts: Astro-Physics Mach 1 GTO AP Mach1

Guiding telescopes or lenses: Rokinon 135mm f/2.0 ED UMC Telephoto Rokinon 135mm

Guiding cameras: QSI583wsg5

Software: Adobe Lightroom  ·  Pixinsight 1.8 PixInsinght 1.8

Accessory: Robofocus Stepper MotorFocuser

Dates:Sept. 22, 2019

Integration: 0.0 hours

Avg. Moon age: 22.54 days

Avg. Moon phase: 45.83%

Astrometry.net job: 2981744

RA center: 0h 2' 11"

DEC center: +66° 33' 59"

Pixel scale: 8.617 arcsec/pixel

Orientation: 1.914 degrees

Field radius: 3.694 degrees

Resolution: 2185x2184

Locations: DeepSkyWest, Rowe, New Mexico, United States

Data source: Amateur hosting facility

Remote source: DeepSkyWest


The star-forming region NGC 7822 in Cepheus. In this monochrome Hydrogen image you can better see the dark, dense areas where one day stars will be formed. Some of the stars which began fusion just a few million years ago are now energising parts of this region and lighting it up. Kind of looks like a question mark.

Includes the emission region Sharpless 171, and a young star cluster Berkeley 59.

LRGB and H-alpha images created using PixInsight (for calibration, registration, integration) and Adobe Lightroom (for cosmetic adjustments). 300s exposures (63xL, 54xR, 36xG, 34xB, 53xH). Captured in New Mexico at Deep Sky West, using a QSI WSG-5 CCD Camera and a 135mm f/2 Rokinon lens.


Sky plot

Sky plot


Sharpless 171 / NGC  7822 (H-alpha),