M 2-55
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.
IM 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.
IM 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.

TARGET
Nomenclature: M 2-55
Image Right Ascension: 23:25:53.60
Image Declination: +42:32:06
Discovery: Rudolf Minkowski
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors
10Micron GM2000 HPS mount
Twin QSI6120 CCD cameras
Astrodon filters
IMAGE CAPTURE
Ha 5nm: 318x900" bin 1x1
OIII 3nm: 123x900" bin 1x1
Red: 20x300" bin 1x1
Green: 18x300" bin 1x1
Blue: 18x300" bin 1x1
Total integration: 114 hours 55 minutes
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.157 degrees
Capture dates: 29 September - 10 October 2023
Capture location: Fregenal de la Sierra, Spain
Ha 5nm: 318x900" bin 1x1
OIII 3nm: 123x900" bin 1x1
Red: 20x300" bin 1x1
Green: 18x300" bin 1x1
Blue: 18x300" bin 1x1
Total integration: 114 hours 55 minutes
Pixel scale: 0.533 arcsec/pixel
Field radius: 0.157 degrees
Capture dates: 29 September - 10 October 2023
Capture location: Fregenal de la Sierra, Spain
IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Pixinsight, Photoshop CS2
Pre-processing: CCDStack2
Post-processing: Pixinsight, Photoshop CS2