Andrew Cooper
Jun 27, 2020    Waikoloa Quarry, HI (map)
8x42mm Nikon Prostaff 3S Binoculars @ 8x
Seeing: 7 Transparency: 7 Moon: 0%

A notable fuzzy star 1° northwest of Kaus Borealis, small, round, not resolved, in the field with M22

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

Bright, modest size at 10', fully resolved, dense core, the extents lost in the rich galactic starfield, a decent globular cluster overshadowed by it neighbor M22

Andrew Cooper
Jun 29, 2019    Kaʻohe, Mauna Kea, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 56x
Seeing: 8 Transparency: 7 Moon: 0%

Just north of Kaus Borealis, small, bright, partially resolved, quite concentrated with a bright core, located in a rich galactic star field

Andrew Cooper
May 23, 2014    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 7 Transparency: 7 Moon: 0%

A beautiful globular seen in rich galactic starfield, 10' in diameter, fully resolved, quite concentrated at the center

Andrew Cooper
May 25, 2006    Gila, NM (map)
46cm f/4.5 Deep Violet

A decent globular so often overshadowed by nearby M22 (much like M92 in M13's shadow), good sized, bright, resolved, concentrated well at core

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

Not bright. h., 14-16mg. 1° np λ.

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

John Herschel
Jul 1, 1826    

Not very bright; but very rich, excessively compressed globular cluster; stars of 14th to 15th magnitude; much brighter toward the middle; a fine object.

Charles Messier
Jul 27, 1764    

Nebula discovered in the upper part of the bow of Sagittarius at about one degree from the star Lambda & little distant from the beautiful nebula which is between the head and the bow [M22]. It contains no star; it is round, it can only be seen difficultly with an ordinary telescope of 3.5-foot. Its position has been determined from Lambda Sagittarii. Observed again March 20, 1781.

― Connaissance des Temps, 1781