Andrew Cooper
Oct 8, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 136x
Seeing: 5 Transparency: 6 Moon: 0%

Small, bright, round, 5' diameter, not resolved, nicely concentrated core

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

Quite small at 5', bright, partially resolved, a 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%

Small, not resolved, very concentrated core, 3' across

Andrew Cooper
Jun 13, 1999    Pinal Peak, AZ (map)
20cm f/10 SCT

Smallish, not resolved, bright center. This is where it ends. All 110 objects located and recorded. Done!

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

Bright nucleus with low power. h., resolvable.

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

Charles Messier
Oct 18, 1780    

Nebula without star, between Sagittarius & the head of Capricornus; seen by M. Méchain on August 27 & 28, 1780. M. Messier looked for it on the following October 5, & on October 18, compared it with the star 4 Capricornusi, of sixth magnitude, according to Flamsteed: it seemed to M. Messier to be composed of nothing but very small stars, containing nebulosity: M. Méchain reported it as a nebula without stars. M. Messier saw it on October 5; but the Moon being above the horizon, & it was not until the 18th of the same month that he was able to judge about its form & determine its position.

― 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