Caroline's Rose Cluster NGC 7789
Photo description / processing
I decided to check what's in Ha and noticed a planetary nebula at the left edge of the frame, slightly above the bright yellow star. I shot a bit of Ha to see what's what, and as a bonus it turned out pretty good. The cluster was discovered by Caroline Herschel in 1783, so the name isn't just another folk creation. The small nebula, by the way, is Abell 82 (PK 114-04.1).
Technical information
- Telescope/Lens
- Askar 71F
- Camera
- ZWO ASI2600MM PRO
- Mount
- JUWEI 14
- Guide Scope
- ToupTek GS-200 AR
- Guide Camera
- Zwo ASI662MC
- Accessories
- CAA, EAF, EFW, ASIAIR MINI, Askar Reducer x 0.75, Gemini PowerBox
- Software
- Siril, Adobe Lightroom
- Location
- Самара, Россия
Light pollution
Yellow, Bortle 5 zone
- Date taken
Exposure
- 11 × 120″ · ISO/Gain: 100 · Optolong L ·
- 5 × 120″ · ISO/Gain: 100 · Optolong R ·
- 5 × 120″ · ISO/Gain: 100 · Optolong G ·
- 5 × 120″ · ISO/Gain: 100 · Optolong B ·
- 17 × 120″ · ISO/Gain: 100 · Antlia EDGE Ha 4.5 nm ·
Total exposure: 1 h 26 m
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