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Messier 15 |
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 | M15 is over 33,000 light-years away and 120 light-years across, in the constellation Pegasus and is one of the more conspicuous of the large globular star clusters, almost visible to the naked eye. Easily found one full binocular field (about 4°) west of epsilon, the bright orange "hoof" star of Peg, in a line formed by eta and theta Pegasus further east. In the binocular field, M15 is visible as a pretty, brightish white spot, just 10' SW of a mag. 7 star. It seems brighter and more concentratred than nearby M2. In a 8-inch scope at 49X, it doesn't quite want to resolve with direct vision. Averted vision, however, revealed a smattering of stars along the outer edges. 81X provided a much better view. The outer stars could be seen with direct vision, along with a bright, fuzzy core. Further increases in magnification revealed more and more stars toward the center of the cluster. |
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M15 NGC 7078 Other description: Globular cluster highly resolved. Constellation: Pegasus Dreyer description: Remarkable!, globular cluster, very bright, very large, irregularly round, very abruptly much brighter middle, well resolved, stars very small; = M15. Magnitude: 6.4 RA: 21h 30m 11.9s Dec: +12°10'52" RA: 21h 30m 00.0s Dec: +12°10'00" (Epoch 2000) Azm: 106°29'25" Alt: +31°33'21" Rise: 21:22 Transit: 04:21 Set: 11:15 Size:12.3' |