Andrew Cooper
Sep 12, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 135x
Seeing: 5 Transparency: 7 Moon: 0%

A modest globular, faint, unresolved, no notable core, about 4' across, a bit over 1° west of M73

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

Small at well less than 5', partially resolved, a modest core, a modest globular cluster overall

Andrew Cooper
Aug 11, 2018    Kaʻohe, Mauna Kea, HI (map)
28cm f/10 SCT, NexStar 11" GyPSy @ 233x
Seeing: 7 Transparency: 7 Moon: 0%

Small, bright, partially resolved, no notable concentration at the core

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

Small, 3' diameter, modest globular, just resolved

Andrew Cooper
Apr 18, 2010    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 7 Moon: 0%

Not very bright, fully resolved, modest core, about 3' across

Andrew Cooper
Sep 5, 2008    Hale Pohaku, HI (map)
28cm f/10 SCT Gypsy @ 233x
Seeing: 6 Transparency: 7.5 Moon: 0%

Modest globular about 5' in diameter, fully resolved, core not concentrated, M73 is 1°20' east

Andrew Cooper
Oct 21, 2006    TIMPA, Avra Valley, AZ (map)
12x36 Canon Image Stabilized Binoculars

Dim, difficult to see or locate, but easy to confirm as it forms an equilateral triangle with a mag 6 and mag 7 star, small, round, not resolved, M73 1/2 (1°20') field east

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

Rather dim, no stars resolved

Charles Messier
Oct 4, 1780    

Nebula seen by M. Méchain in the night of August 29-30, 1780, above the neck of Capricornus. M. Messier looked for it on the 4th and 5th October following: the light is as faint as for the preceding [M71]; near it is a small telescopic star: the position was determined from the star Nu Aquarii, of fifth magnitude.

― Connaissance des Temps, 1781

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

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