Andrew Cooper
May 21, 2022    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 6 Transparency: 6.5 Moon: 0%

Bright and obvious, small at 1' diameter, round with a brighter center, no color or central star noted

Andrew Cooper
Feb 22, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 61x
Seeing: 7 Transparency: 6.5 Moon: 0%

Small, faint, round, brighter to the center, no color noted, no central star noted

Andrew Cooper
May 13, 2018    Kaʻohe, Mauna Kea, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 102x
Seeing: 8 Transparency: 7 Moon: 0%

Small, round, a conspicuous central star, no color noted, no structure noted

Andrew Cooper
Mar 2, 2011    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 6 Moon: 0%

A 2' halo surrounding a bright central star, bright, slightly bluish, no other structure noted

Andrew Cooper
Apr 17, 2010    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 7 Transparency: 7 Moon: 0%

Bright, an even round halo around and easily visible central star, a distinct green color

Andrew Cooper
May 25, 2003    White Stallion Ranch, Marana, AZ (map)
46cm f/4.5 Deep Violet

A modest halo around a bright central star, evenly tapering off in all directions, no other structure noted

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

H., resolvable. Nucleus.

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

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