M39 – Open Cluster
M39 (NGC 7092) is a sparse open cluster located approximately 320 parsecs away, within the Galactic plane, in the constellation Cygnus. With an estimated age of between 280 and 300 million years, its stellar population is dominated by B- and A-type stars that are still on the main sequence. The cluster contains around thirty confirmed members and has a low central concentration, characteristic of moderately evolved open clusters. It has an integrated magnitude of +4.6 and an angular diameter of approximately 30 arcminutes, making it an extended object ideally suited to observation with binoculars or wide-field telescopes.
General information
- Constellation
- Cygnus
- Category
- Clusters and stars
- Date
- 28 December 2024
- Capture sessions
- 28 Dec 2024 — CLS, R, G and B
Capture
- Total time
- 30min
- Subframes
- 30s (CLS: 30x) bin1; RGB: 30s (R: 10x, G: 10x, B: 10x) bin2
- Gain / Offset
- 125 / 30
- Calibration
- 50 dark frames, 50 flat frames and 50 dark-flat frames, without bias frames
Equipment
- Telescope
- TS102 f/5.6
- Camera
- ZWO ASI294MM
- Filters
- CLS, R, G and B
- Mount
- Sky-Watcher Wave 150i
- Guiding
- PHD2, Guide scope 60 mm f/4
- Focuser
- ZWO EAF
- Filter wheel
- ZWO EFW with 7 positions
Processing and environment
- Processing
- Stacked and post-processed with PixInsight 1.9.2
- Acquisition
- NINA
- Location
- l'Ampolla, Tarragona
- Sky
- Bortle 4