Andrew Cooper
Jun 20, 2023    Waikoloa, HI (map)
15cm f/5 Newtonian, Primero @ 92x
Seeing: 6 Transparency: 7 Moon: 0%

Small, bright and obvious, a rich open cluster about 10' in diameter, a round region of haze punctuated by a scattering of 10-11th magnitude stars, a 9th magnitude star in the southwest quadrant, rich, partially resolved, 49' east-southeast of δ Sct in rich galactic starfield

Andrew Cooper
Jul 19, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 81x
Seeing: 6 Transparency: 6 Moon: 0%

A bright clump in a rich galactic starfield, conspicuous, bright, partially resolved, a fan shaped body with the 7th magnitude HD173348 at the western apex

Andrew Cooper
Jun 24, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 61x
Seeing: 7 Transparency: 6 Moon: 0%

A conspicuous clump in a very rich galactic starfield, a handful of brighter members embedded in a haze of faint stars, small, bright, partially resolved, the magnitude 9.2 HD173348 is the brightest star near the center

Andrew Cooper
Apr 19, 2012    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 7 Transparency: 7 Moon: 0%

A poor cluster, sparse, a few dozen members arranged in clumps across a 10' region

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

In the Milky Way, I expected more than this small group of stars, setting circles confirm the correct identification

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

Coarse cl.

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

John Herschel
May 27, 1835    

Pretty rich; irregularly round; pretty well insulated; not much compressed toward the middle; 10' diameter; stars from 12th to 15th magnitude; one of 9m taken.

Charles Messier
Jun 20, 1764    

A cluster near Eta and Omicron in Antinous [now α and δ Scuti], between which there is another one of more brightness: with a telescope of 3.5-foot one cannot distinguish them, one needs to employ a good instrument. This cluster contains no nebulosity.

― Connaissance des Temps, 1781

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

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