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|Description:||Approximately the size of the full moon, this
grand globular cluster is difficult to image from most of the US, since it never
gets very far above the horizon. Atmospheric extinction makes the blue
channel particularly difficult.
|Exposure Data:||5/20/2004. RGB: 6x5m, 6x5m, 6x5m. -10°C,
|Processing:||Acquired via Sequencer II and CCDSoft, reduced,
aligned and combined in Mira, RGB and DDP in Maxim, curves, levels and other processing in Photoshop.
|Optical System:||FSQ-106 @ F/5, ST-10XME NABG/CFW-8A CCD camera,
AstroDon filters, EM-200 mount, dithered 4 pixels, auto focus every two
|Comments:||Average target elevation was 11° in Fort Davis,
TX. The FOV is
1.3° x 1.0°