M 57 Published by BBC The Sky At Night August 2018 Featured on The Astroimaging Channel 19 August 2018
M57 is a very small planetary nebula in the constellation Lyra. It is 2,570 light years from Earth.
TARGET Nomenclature: M57, Messier 57, Ring Nebula, NGC 6720, GC 4447 Right Ascension: 18:53:35 Declination: +33:01:45 Size: 1.5 arc min, the double outer halo is 5 arc min Discovery:Charles Messier in late January 1779
EQUIPMENT USED APM TMB LZOS 152 refractor 10Micron GM2000 HPS mount QSI6120 CCD camera Astrodon filters
IMAGE CAPTURE 5nm Ha: 15x1200 bin 1x1, 10x1200 bin 3x3 3nm OIII: 11x1200 bin 1x1, 13x1200 bin 2x2 Red: 10x300 bin 1x1 Green: 8x300 bin 1x1 Blue: 10x300 bin 1x1 Total integration: 18.7 hours Pixel scale: 0.534 arcsec/pixel Field radius: 0.248 degrees Capture dates: 6 June - 25 July 2017 Capture location: Alcalali, Spain