M57 (NGC 6720; PK 63+13.1), Ring Nebula, in Lyra
Imaging - Valery Genkov, processing - Velimir Popov |
   
Discovered by Antoine Darquier de Pellepoix in 1779
| Right Ascension |
18 : 53.6 (h:m) |
| Declination |
+33 : 02 (deg:m) |
| Distance |
2 300 (ly) |
| Visual Brightness |
8.8 (mag) |
| Apparent Dimension |
1.4x1.0 (arc min) |
The famous ring nebula Messier 57 (M57, NGC 6720) is often regarded as the prototype of a planetary nebula, and a showpiece in the northern hemisphere summer sky.
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| Optic(s) |
24" Zeiss Cassegrain @ f/12.5 |
| Mount: |
German Equatorial - Zeiss |
| Camera: |
FLY ProLine PL09000 - Front Illuminated monochrome cooled CCD camera – 3056 x 3056 px ; Sensor Diagonal 51.9 mm; 12 µm x 12 µm |
| Filters: |
R + V + B |
| Dates/Times: |
2009-07-01 T 22:17:11 UT |
| Location: |
Observatory Rozhen (BAS) - Rhodope Mountains |
| Exposure Details: |
B, V and R: 6x1 min each of colours (1x1 binning), Total ExposureTime - 18 min. Combined as RGB in MaxIm DL |
More details: |
Bias and Dark frames calibrated |
Guiding: |
No |
| Processing: |
MaxIm DL / PhotoShop |
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