Messier 39 is an open cluster in constellation Cygnus. It is also known as NGC 7092. The cluster was discovered by Guillaume Le Gentil, a French astronomer, in 1749. It took fifteen years until Charles Messier added M39 to his catalogue.
To me, beside the actual open cluster, I like this picture because there are so many additional stars in the background.
 | Date | 2013/11/11 |
 | Location | Böblingen / Germany |
 | Object | Open Cluster M39 |
 | Camera | Atik383L+ |
 | Guiding | yes, DMK31AU03.AS via OAG |
 | Telescope | 8" GSO Newtonian |
 | Barlow lens | none |
 | Mount | EQ6Syntrek |
 | Cooling | -15°C |
 | Luminance | 5x 400s, bin: 1x1 |
 | Red | 5x 100s, bin: 2x2 |
 | Green | 5x 100s, bin: 2x2 |
 | Blue | 5x 100s, bin: 2x2 |
 | Dark | 6x |
 | Flat | 10x |
 | Total exposure | ~58m |
The image is also available in full resolution.
Clear skies!
Last updated: June 20, 2022 at 10:16 am