Messier 18 - NGC 6613

No dss image available for Messier 18
Aladin viewer for the region around Messier 18
Bode 53, h 2007, GC 4401, Cr 376, Lund 826

Type  Open Cluster
Magnitude  6.9
Size  9'
Right Ascension  18h 19' 58.6"  (2000)
Declination  17° 6' 7" S
Constellation  Sagittarius
Description  Cl, P, vlC
Classification  II 3 p n
Observing Notes

Andrew Cooper
Jun 29, 2019    Kaʻohe, Mauna Kea, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 56x
Seeing: 8 Transparency: 7 Moon: 0%

A small bright cluster between M17 and the large star cloud of M24, small, bright, coarse, fully resolved.

Andrew Cooper
Aug 12, 2017    Waikoloa, HI (map)
Hodgepodge w/TV-76mm f/6 APO @ 30x
Seeing: 6 Transparency: 6 Moon: 0%

A small and non-descript cluster at low power, 5' across, coarse, not much more than a clump in the Milky Way starfield

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, sparse cluster notable only for the brightness of those few members it does posess, about 10' across

Andrew Cooper
Apr 18, 2010    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 60x
Seeing: 6 Transparency: 7 Moon: 0%

A coarse cluster in a rich field, a dozen 10th magnitude stars in a 10' area, lost in a very rich region

Andrew Cooper
Jun 6, 1998    TIMPA, Avra Valley, AZ (map)
20cm f/10 SCT

Sparse open cluster of about a couple dozen stars, strung out east-west, overall a poor object in this area of stellar wonders

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

Glorious field in a very rich vicinity; s lies a region of surpassing splendour.
― Celestial Objects for Common Telescopes, T. W. Webb, 1917

William Herschel
Jun 22, 1784    19 New King Street, Bath (map)

A cluster of coarsely scattered large stars, not rich.

Charles Messier
Jun 3, 1764    

A cluster of small stars, a little below above nebula, No. 17, surrounded by slight nebulosity, this cluster is less obvious than the preceding, No. 16: with an ordinary telescope of 3.5-foot, this cluster appears like a nebula; but with a good telescope one sees nothing but stars.
― Connaissance des Temps, 1781
Other Data Sources for Messier 18
Nearby objects for Messier 18
4 objects found within 60'
Barnard 93 IC 4701
NGC 6596

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

Messier 18