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Open Cluster
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| Object : | NGC 2281 (Cr 116) |
| Coordinates/Direction : | RA: 06h17m, DEC: +41o04' |
| Object size : | 25' |
| Apparent magnitude : | 5.4 |
| Distance : | 1722 ly |
| No solar mass : | - stars |
| Radius : | - ly |
| Find in constellation : | Auriga |
| More to know : |
Wikipedia: https://en.wikipedia.org/ wiki/ NGC 2281 |
NGC 2281, 2024-11-23
(click on the image to get a full resolution photo in a new window) |
| Date : | 2024-11-23 |
| Time (UT) : | 19:03 - 20:09 |
| Mount : | SkyWatcher EQ6 Pro, Beltdrive (DIY 2019) |
| Guide : | QHY5 camera with off-axis |
| Lens/telescope : | Pentax 645 FA 300 mm ED f/4 (set to f/4) |
| Corrector/Barlow : | - |
| Field (FOV) : | 6.8x4.5o (full frame) before crop |
| camera : | Nikon D800, QE=0.56, full frame, 36 Mpixel, 14 bit |
| camera temperature: | - , no temperature sensor |
| Film/CCD : | Raw, NEF |
| Filter : | none |
| Control system: | Mount, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux) |
| Exp. time : | 60x60 seconds, iso400, dithered every third image |
| Image process tool : | Siril, GraXpert, Gimp, Irfanview |
| Processing : | flat, astro metric color calibration, background |
| Weather : | Clear sky, Rel Humidity -, Moon Phase 46%, Temperature ?o C |
| Site : | Sweden, Stockholm, Hagsätra.
Bortle 9 Free view Az: 20o to 90o, 165o to 185o, Alt: 20o to 55o |
| Comment : | More than one years ago I took this image, but never processed it. Now in 2026 I do it with today's tools. |
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