Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
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Sh2-132 - The Lion Nebula, John Kulin
Sh2-132 - The Lion Nebula
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Sh2-132 - The Lion Nebula

Getting plate-solving status, please wait...
Sh2-132 - The Lion Nebula, John Kulin
Sh2-132 - The Lion Nebula
Powered byPixInsight

Sh2-132 - The Lion Nebula

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Description

This was captured at the beginning of November 2020 from my Backyard Observatory.

I have reprocessed this a number of times and finally found some interesting scripts that help me achieve what I was aiming for.

Using a 2007mm FL it is a really busy image, reminiscent of some of my early childhood nightmares, it may well have been better at a shorter focal length.

Well here's the Bumf: -

Sharpless 132 is home to Wolf-Rayet star WR153ab. These massive stars are nearing their transition to supernova or black hole. In the OIII wavelength there appears to be a river of blue gasses running up through the nebula. However, reading through as much as I can understand of an abstract on this (https://academic.oup.com/mnras/article/405/3/1976/967297), they note:

"New Hα and [O iii] images taken by Miller & Chu (1993) revealed an arc of 4 arcmin in size to the south of the WR star (at [l, b]=[102°46′, −0°43′]). They concluded that the filament probably indicates the position of an ionization front and considered it to be a ring nebula related to the star. Based on optical data, Esteban & Rosado (1995) found velocities in the range −41 to −59 km s−1 for the arc and derived an electron density of 290 ± 100 cm−3 from line ratios. The [O iii]/Hα ratio is consistent with values derived for ring nebulae, suggesting that WR 153ab is the main source of ionization (Esteban & Rosado 1995). These authors classify the arc as Rs type based on the morphology of this feature and on the absence of a clear evidence of expanding motions in the line profiles. This last point suggests that the massive progenitor of the WR star contributed in the shaping of the nebula (see Chu 1981)."

Fascinating! So this appears to be part of a ring nebula being pushed by the WR star

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Sh2-132 - The Lion Nebula, John Kulin