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A GLOBULAR CLUSTER IN LYRA
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The globular cluster Messier 56 is found in the part of Milky Way that runs through the constellation Lyra. Admiral Smyth describes M 56 as “a globular cluster in a splendid field†in his “A Cycle of Celestial Objects†(2nd Ed, 1881). The image was taken on 15 June 2016 in Mayhill, NM with a 12.5†RCOS f/9 telescope operating at f/5.95 (Astro-Physics CCDT67 reducer) and a SBIG STF8300c camera mounted on a Paramount ME. Exposure was a total of 1 hr 40 min (5 x 20 min lights @ -15 degrees C; 40 darks; 128 flats; 128 bias). Calibrated, registered, integrated, and processed in PixInsight 1.8.4.1195 Ripley (x64).
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