M 2-55 and it's elusive fragmented bow-shock front (Peter Goodhew)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: PK116+08.1

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M 2-55 and it's elusive fragmented bow-shock front

Link: https://www.imagingdeepspace.com/m-2-55.html

Powered byPixInsight

M 2-55 and it's elusive fragmented bow-shock front

Link: https://www.imagingdeepspace.com/m-2-55.html

M 2-55 is an evolved rarely-imaged planetary nebula in the constellation Cepheus. It was first discovered and identified by the German-American astronomer Rudolph Minkowski on photographic plates at Mount Wilson in 1947. The plates were taken by W.C. Miller with a 10" f/5.2 refractor.
M 2-55 possesses two sets of bipolar lobes.
It was only in 2020 that a team of Chinese professional astronomers detected an arc of material running from the SE to the SSW. (Chih-Hao Hsia et. al, March 13th 2020, “Discovery of Extended Structures around Two Evolved Planetary Nebulae M 2-55 and Abell 2”). They concluded that this arc was furnishing strong evidence for an interaction of the expanding nebula of \m 2-55 with its surrounding interstellar material. The presence of fragmentation in the arc may be the result of a phenomenon known as Rayleigh-Taylor (RT) instabilities.
I became aware of this thanks to Astroian's deep image.

Planetary Nebulae
Entre Encinas y Estrellas (e-EyE)

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Status	Advanced success
Started	...
Astrometry.net job	8612438
PixInsight job	51ZVRXKO9S1NQAMQSYKEWR4KDBMTFK6H
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h32m46s.682
RA (top/left)	23h34m19s.295
RA (top/right)	23h31m14s.173
RA (bottom/right)	23h31m14s.862
RA (bottom/left)	23h34m18s.369

Dec (center)	+70°22′12″.90
Dec (top/left)	+70°27′32″.30
Dec (top/right)	+70°27′32″.62
Dec (bottom/right)	+70°16′50″.90
Dec (bottom/left)	+70°16′50″.48

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M 2-55 and it's elusive fragmented bow-shock front

M 2-55 and it's elusive fragmented bow-shock front

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M 2-55 and it's elusive fragmented bow-shock front

M 2-55 and it's elusive fragmented bow-shock front

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