The movement of Comet C/2009 P1 (Garradd) alongside the Globular Cluster M71 (NGC 6838) in Sagitta
There is some flickering due to atmospheric conditions and a gap in the sequence because of the unusable images.
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Details
Comet C/2009 P1 (Garradd) and globular cluster M71 Globular Cluster M71 (NGC 6838), class X-XI, in Sagitta
Messier 71 (M71, NGC 6838) is a loose but beautiful globular cluster in the small but nice constellation Sagitta.
| Right Ascension |
19 : 53.8 (h:m) |
| Declination |
+18 : 47 (deg:m) |
| Distance |
1.25 (kly) |
| Visual Brightness |
8.2 (mag) |
| Apparent Dimension |
7.2 (arc min) |
Images sequence: from 2011-08-26 T20:12:52 UT to 2011-08-27 T00:14:59 UT
Total images: 12
| Seeing: |
Good - Pickering 7 rating |
| Optic(s): |
TL APO 90/600 @ f/6.7 |
| Mount: |
ASA DDM 85 - operated by my friend Emil Ivanov |
| Camera: |
Artemis Art 4021 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm |
| Filters: |
Astronomics LRGB Set, SupaSlim TrueTechnology Computerized Filter Wheel |
| Dates/Times: |
2011-08-27 |
| Location: |
Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42" |
| Exposure Details: |
LRGB: L (IR cut): 1x1 min (Bin 1), R, G and B: 1x1 min each of colours (Bin 1), Total Exposure Time for every one image - 4 min. Total- 12 images |
| More details: |
Dark calibrated |
| Guiding: |
SBIG STL-11000M internal sensor and 12" ASA Astrograph |
| Processing: |
MaxIm DL / AIP4Win / PSCS5 |
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