M 57
Published by BBC The Sky At Night August 2018
Featured on The Astroimaging Channel 19 August 2018
Published in Astronomy Now Magazine June 2020
Published by BBC The Sky At Night August 2018
Featured on The Astroimaging Channel 19 August 2018
Published in Astronomy Now Magazine June 2020
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
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
IMAGE PROCESSING
Pre-processing: CCDStack2
Post-processing: Photoshop CS2
Pre-processing: CCDStack2
Post-processing: Photoshop CS2