Hemisphere:  Northern  ·  Contains:  NGC 7822
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Sh2-171 - An Autumn Beauty, 


            Ivaylo Stoynov
Sh2-171 - An Autumn Beauty
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Sh2-171 - An Autumn Beauty

Technical card

Imaging telescopes or lenses: William Optics Megrez 80 FD

Imaging cameras: QHYCCD QHY 22

Mounts: Takahashi EM-200

Guiding telescopes or lenses: ZWO 60/280 GuideScope

Guiding cameras: QHY5L-II Mono

Focal reducers: William Optics FF/FR 0.8x II

Software: PixInsight PixInsinght 1.8 RC7  ·  PHD guiding  ·  photoshop  ·  APT - Astro Photography Tool

Filters: Astrodon HII-3nm  ·  Baader Planetarium 2" UV-IR Cut Filter

Dates:Oct. 5, 2018Oct. 6, 2018

Astrodon HII-3nm: 33x600" -40C bin 1x1
Astrodon O-III 3nm: 23x600" -40C bin 1x1

Integration: 9.3 hours

Avg. Moon age: 26.06 days

Avg. Moon phase: 13.26%

Temperature: 5.00

Basic astrometry details

Astrometry.net job: 2316324

RA center: 0h 3' 56"

DEC center: +67° 10' 12"

Pixel scale: 3.574 arcsec/pixel

Orientation: 104.228 degrees

Field radius: 0.947 degrees

Resolution: 1483x1200

Locations: Nedelkovo, near Sofia, Bulgaria

Data source: Backyard


Sh2-171 (AKA NGC 7822) is a young star forming complex in the constellation of Cepheus, 2600-3200ly away from Earth. The nebula is included in the Sharpless catalog while the young star cluster located in the upper left corner close the dark nebula is cataloged as Berkeley 59. The star from this cluster pointed by the thin dark arrow with approximate position at 10 a clock, on the border of the dark lagoon, is BD+66 1673 is considered as one of the hottest stars within 1 kpc of the Sun. Its temperature is around 45 000 K and a luminosity ~100 000 times that of the Sun. It is one of the primary energy sources that lit the nebula and is forming the pillars of creation visible in the nebula. They are regions of star formation in which the proto stars create enough energy winds to resist to the powerful stellar winds of BD+66 1673.



Ivaylo Stoynov
License: None (All rights reserved)

Sky plot

Sky plot


Sh2-171 - An Autumn Beauty, 


            Ivaylo Stoynov