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Nebula |
| Object : | NGC 281, Pacman Nebula, or IC11 |
| Coordinates/Direction : | RA: 00h59m, DEC: +56o37' |
| Object size : | 35' |
| Object magnitude : | - |
| More to know : |
Wikipedia: https://en.wikipedia.org/ wiki/ NGC 281 |
NGC 281 2024-11-07
(Click on image to get one in full resolution in a new window)
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| Date : | 2024-11-07 |
| Time (UT) : | 18:20 to 19:33 |
| Mount : | SkyWatcher HEQ5, belt modified, low rider |
| Guide : | ASI120 camera with off-axis |
| Lens/telescope : | Pentax 645 FA 300 mm ED f/4 (medium format lens) |
| 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, 64-bit) |
| Exp. time : | 31x120 seconds, iso400, every third dithered |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | flat, photometric color calibration |
| Weather : | clear sky, temperature +3o C |
| Site : | Sweden, Stockholm, Tyresta Nature reservation, Spirudden. Bortle 4 |
| Comment : | Taken from a dark sky you get so much more. Even when the camera isn't IR modified it can catch some H-Alpha radiation as this camera do. But to short exposure time, 4 minutes had been better. The size of the nebula is 35', about the same size as Moon looks to have. |
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