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Globular Cluster
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| Object : | M53, Globular Cluster |
| Coordinates/Direction : | RA: 13h12m, DEC: +18o10' |
| Object size : | 13' |
| Object magnitude : | 8.3 |
| More to know : |
Wikipedia: https://en.wikipedia.org/ wiki/ Messier 53 |
M53 2020-03-20
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| Date : | 2020-03-20 |
| Time (UT) : | 23:55 to 00:15 |
| Mount : | SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019) |
| Guide : | QHY5 camera with 400 mm f/6.3 lens |
| Lens/telescope : | TS130 APO f/7 910mm, 3" focuser |
| Corrector/Barlow : | 3" field flatter, x1. T48 connector to camera |
| Field (FOV) : | 2.25 x 1.5o (full frame) before crop |
| camera : | Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit |
| camera temperature: | About 6o C above surrounding temperature |
| Film/CCD : | Raw, Cr2 |
| Filter : | none |
| Control system : | Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC |
| Exp. time : | 93x60 seconds, ISO1600, dithering mode |
| Image process tool : | AstroImageJ, Fitswork, IrfanView |
| Processing : | demosaic, synthetic flat calibrated, hot pixel removed by dithering, level |
| Weather : | clear with drifting clouds |
| Site : | Sweden, Stockholm, Hagsätra.
Bortle 9 Free view Az: 20o to 90o, 165o to 185o, Alt: 20o to 55o |
| Comment : | One more object in Southern direction. This is M53, a globular cluster and it's 58'000 light years far away. Compare with the Hubble image on the link above, it's a difference but I took this from our balcony ! |
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