NGC 891 - Spiral Galaxy type Sb, in Andromeda
LRGB combination (Click for a larger view 1200 x 1200 px)
Details
Spiral Galaxy NGC 891 (GC 527, h 218, H 5. 19), type Sb, in Andromeda
Discovered by William Herschel in 1784.
| Right Ascension |
02 : 22.6 (h:m) |
| Declination |
+42 : 21 (deg:m) |
| Distance |
10 000 (Kly) |
| Visual Brightness |
10 (mag) |
| Apparent Dimension |
13.5 x 2.8 (arc min) |
| Seeing: |
Pickering 6 rating - Fair to Good |
| Optic(s): |
APO 90/600 @ f/6.7 |
| Mount: |
ASA DDM 85 - operated by my friend Emil Ivanov |
| Camera: |
Artemis Art 4021 - monochrome cooled CCD camera – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm |
| Filters: |
Astronomics LRGB Set, SupaSlim TrueTechnology Computerized Filter Wheel |
| Dates/Times: |
2011-8-28 |
| Location: |
Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42" |
| Exposure Details: |
L = 40 min (1x1 binning), R = 20 min, G = 20 min, B = 20 min, (1x1 binning), Subexposures L = 10 min, RGB = 10 min, Total Exposure Time - 100 min |
| More details: |
Dark frames reduction |
| Guiding: |
None |
| Processing: |
PixInsight / PS |
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