M28 - NGC 6626
DSS image of M28
Overlaid DSS image of M28, 30' x 30' with north at top and west to the right

Aladin viewer for the region around M28
Bode 58, h 2010, h 3743, GC 4406, C 1821-249

Type  Globular Cluster
Magnitude  6.9
Size  11.2'
Right Ascension  18h 24' 32.9"  (2000)
Declination  24° 52' 11" S
Constellation  Sagittarius
Description  vB, L, R, geCM, rrr
Classification  IV
Observing Notes

Andrew Cooper
Jun 27, 2020    Waikoloa Quarry, HI (map)
8x42mm Nikon Prostaff 3S Binoculars @ 8x

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

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

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 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
Other Data Sources for M28
Nearby objects for M28

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