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M4 (NGC6121) |
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Description |
Globular Cluster (Class IX) in the constellation Scorpion. Diameter 22.8, brightness 5.6mag. |
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Date |
June 1, 2002 |
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Telescope |
Meade 10" SCT @f/4.2 (f=1040mm), Losmandy G11 mount, FS2 drive unit |
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CCD Camera |
ST-7 at -20°C, IR filter |
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Exposure |
3x300s (1x1) |
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Localisation |
Kriftel / Rhein-Main area |
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Conditions |
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Note |
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Image Processing |
Full calibration, digital development, exponentiell stretching |
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© Copyright 2002-2007 by Jürgen Stein |