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Sh2-132 The Lion Nebula - two panel mosaic, 




    

        Barry Wilson
Sh2-132 The Lion Nebula - two panel mosaic

Sh2-132 The Lion Nebula - two panel mosaic

Technical card

Resolution: 4390x3226

Dates: July 21, 2018

Frames:
Astrodon 5nm Ha: 34x1200" bin 1x1
Astrodon 5nm Olll: 32x1200" bin 1x1
Astrodon 5nm SII: 34x1200" bin 1x1

Integration: 33.3 hours

Avg. Moon age: 9.00 days

Avg. Moon phase: 66.90%

Astrometry.net job: 2160763

RA center: 334.410 degrees

DEC center: 55.897 degrees

Pixel scale: 2.100 arcsec/pixel

Orientation: 0.686 degrees

Field radius: 1.589 degrees

Locations: Entre Encinas y Estrellas E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Own remote observatory

Description

I am really delighted to be have imaged the full extent of this nebula, having only previously imaged the 'head' area from my home observatory with my longer FL scope (https://astrob.in/269644/D/). A delight to process and experiment with PI techniques. I especially love the 'searchlight' stream of OIII rich gas. It's great to see some fine examples of this target being posted by imagers.

Wikipedia describes it thus: "Sh2 -132 is an extensive visible emission nebula in the Cepheus constellation . It is located on the southern edge of the constellation, a short distance from the border with the Lizard , along the plane of the Via Lattea ; the most suitable period for its observation in the evening sky falls between the months of July and December and is greatly facilitated for observers located in the regions of the Earth boreal hemisphere . Sh2-132 is located at a distance of almost 3200 parsecs (nearly 10400 light years ), thus placing itself inside the Arm of Perseus , in the Cepheus OB1 region, a large and luminous association OB . The stars responsible for ionizing its gases are very hot and massive; in particular, two stars of Wolf-Rayet have been identified, known by the abbreviations HD 211564 and HD 211853 (the latter also having the initials WR 153), in addition to a star of spectral class O8.5V and a dozen of class stars B. Around the star of class O and to one of the stars of Wolf-Rayet extends a clearly visible bubble in the band of the radio waves , identified with the initials Shell B , probably originated from the stellar wind of the two massive stars. A similar but smaller structure, Shell A , houses near its center a star of class K. It is believed that in the nebula there have been processes of chain star formation in the past; at present these processes seem to be suspended, since there is no trace of recent activity. Nine sources of infrared radiation and a maser with H 2 O emissions were detected in the nebula."

Following some research and first spotted by Eagle-eyed Steve, if you look very closely at the lower right of the image, you can see that we have been able to capture Abell 79. It's the little blue splodge just up and left a bit of the open cluster NGC 7226.

Data acquisition: Barry Wilson & Steve Milne.
Processed: Barry Wilson

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Barry-Wilson
Barry Wilson
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Sh2-132 The Lion Nebula - two panel mosaic, 




    

        Barry Wilson