Andrew Cooper
Jul 13, 2021    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 5 Transparency: 6 Moon: 18%

Big, bright and obvious, a very dense core, 10' diameter, partially resolved, seen against a rich galactic starfield

Andrew Cooper
Aug 12, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 6 Transparency: 6 Moon: 0%

Big, bright, partially resolved, a well concentrated core, rich galactic starfield

Andrew Cooper
Jun 24, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 81x
Seeing: 7 Transparency: 6 Moon: 0%

Decent sized, quite bright, dense core, partially resolved, rich galatic starfield

Andrew Cooper
Jun 17, 2020    Waikoloa, HI (map)
28cm f/10 SCT, NexStar 11" GyPSy @ 127x
Seeing: 7 Transparency: 6 Moon: 0%

Large, bright, fully resolved, quite dense at the core

Andrew Cooper
May 30, 2017    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 7 Transparency: 7 Moon: 0%

Very nice globular, bright, fully resolved, decent size at 5' for the main body, very dense core

Andrew Cooper
Apr 18, 2010    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 7 Moon: 0%

Bright, fully resolved, moderately concentrated core, about 5' across

Andrew Cooper
Jun 28, 1998    Santa Rita Mts., AZ (map)
20cm f/10 SCT

Not very resolved, compact globular with nice round structure

Rev. T.W. Webb
May 19, 1885    Hardwick, Herefordshire, England (map)

h., fine cl., but very low.

― Celestial Objects for Common Telescopes, T. W. Webb, 1917

Charles Messier
Jun 4, 1779    

Very beautiful nebula, discovered in Scorpio, it resembles a little Comet, the center is brilliant & surrounded by a faint glow. Its position determined, by comparing it with the star Tau of Scorpius. M. Messier had already seen this nebula on June 7, 1771, without having determined the position where it is close to. Seen again on March 22, 1781.

― Connaissance des Temps, 1781

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

A complete list of credits and sources can be found on the about page