Ced 214/Sh2-171 - HORGB - pigs with lipstick VII (Torben van Hees)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: LBN 580 · LBN 581 · LBN 582 · LBN 583 · LBN 584 · LBN 586 · LBN 588 · LDN 1266 · LDN 1267 · LDN 1268 · LDN 1269 · LDN 1270 · LDN 1271 · LDN 1275 · NGC 7822 · Sh2-171

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Ced 214/Sh2-171 - HORGB - pigs with lipstick VII

Revision title: Reduced brightness

Link: http://astro.van-hees.name

Powered byPixInsight

Ced 214/Sh2-171 - HORGB - pigs with lipstick VII

Revision title: Reduced brightness

Link: http://astro.van-hees.name

Cederblad 214 or SH2-171 is an emission nebula surrounding the star cluster NGC 7822. It is an active star-forming region and includes many "elephant trunks". Its distance is approximately 3000 light years.

This is the first light for my Tak 160ED. Tilt adjustment and sensor distance are still off, but after 3h of working at it in the cold, I just let the setup run for the night. Star shapes are still off, but there is quite some detail visible and the raw H-alpha looked very good, so I took some care with the postprocessing. There was not much O3 signal, so I used tone-mapping techniques to get the bluish tones. Star colors were then blended in from the RGB-shots. While I've seen quite a few images that focus on the "elephant trunks", I've tried to show more of the foreground dust interacting with the H-alpha emissions.

Edit (2023): It turned out the Epsilon was actually defect. Blur XTerminator could salvage the stars and some detail, though. A much better rendering was had after I started treating the O-III signal as the faint wisp it is and didn't try to push the data further than possible by all means. This result now moves this into my "pigs with lipstick" collection. The original renditions are left as a teaching example.

B

Title: Different tone mapping, true black background

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C

Title: More color tweaks

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D

Title: Reduced brightness

Description: I'm not sure why, but AstroBin always shows much brighter than PixInsight for me.

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E

Description: HOO+RGB stars

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F

Description: Continuum Subtraction

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Status	Advanced success
Started	...
Astrometry.net job	5292400
PixInsight job	V7N8Z9RA4585BFX2AFFH99X3F1PG31T7
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h03m18s.381
RA (top/left)	23h51m08s.234
RA (top/right)	00h09m54s.253
RA (bottom/right)	00h15m44s.103
RA (bottom/left)	23h56m08s.266

Dec (center)	+67°11′32″.34
Dec (top/left)	+66°55′45″.87
Dec (top/right)	+66°09′53″.60
Dec (bottom/right)	+67°23′35″.47
Dec (bottom/left)	+68°11′59″.99

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Ced 214/Sh2-171 - HORGB - pigs with lipstick VII

Revision title: Reduced brightness

Ced 214/Sh2-171 - HORGB - pigs with lipstick VII

Revision title: Reduced brightness

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Ced 214/Sh2-171 - HORGB - pigs with lipstick VII

Revision title: Reduced brightness

Ced 214/Sh2-171 - HORGB - pigs with lipstick VII

Revision title: Reduced brightness

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