Open Clusters M35 and NGC 2158 are seen here in the constellation of Gemini.
M35 is a spectacular large open cluster containing at the top left of the frame.
Open cluster NGC 2158, at bottom right, is located about 15 arcminutes to the southwest of M35.
Exposure Data
- Lens: Astro-Physics 130EDT f/8 Triplet Apochromatic Refractor
- F/stop: 8
- Exposure: Composite of 12 x 300 second exposures
- Mount: Losmandy GM 100EQ
- Camera: Canon EOS 20Da DSLR
- Mode: RAW
- ISO: 400
- White Balance: Custom
- In-Camera Noise Reduction: Off
- Filter: None
- Temp: 46.5F
- Time: 4:30 a.m. EDT
- Date September 26, 2006
- Location: Scott's Pit, NJ
- Calibration: Master dark, master bias frames
- Processing: Images calibrated and averaged with min-max exclude in Images Plus. Sky background neutralized in Photoshop. Field flattened with GradientXTerminator.
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