Andrew Cooper
Sep 21, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 5 Transparency: 6.5 Moon: 0%

Big, bright, 15' in diameter, resolved, brighter to the center without a notably dense core, a truly beautiful globular cluster

Andrew Cooper
Jun 27, 2020    Waikoloa Quarry, HI (map)
28cm f/10 SCT, NexStar 11" GyPSy @ 127x
Seeing: 7 Transparency: 7 Moon: 0%

Big at 15', bright, fully resolved, notably the cluster lacks the dense core typical of most globular clusters giving the cluster a loose appearance bordering on that of a rich open cluster

Andrew Cooper
Jun 13, 1999    Pinal Peak, AZ (map)
20cm f/10 SCT

Big, bright, reminiscent of M13, somewhat loose in appearance, fully resolved

Charles Messier
Jul 24, 1778    

A nebula which is a whitish spot, of about 6' extension, its light is even and does not appear to contain any star. Its position has been determined from zeta Sagittarii, with the use of an intermediate star of 7th magnitude. This nebula has been discovered by M. l'Abbe de LaCaille, see Mem. Acad. 1755, p. 194. M. Messier has looked for it in vain on July 29, 1764, as reported in his memoir.

― Connaissance des Temps, 1781

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

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