Discovered by Hodierna before 1654.
Independently rediscovered by De Cheseaux 1745-46.
Independently rediscovered by Lacaille on June 16, 1752.
[Handwritten remark:] Lacaille has it.
[Mem. Acad. for 1771, p. 438 (first Messier catalog)]
In the same night of May 23 to 24, 1764, I have determined the position of a
cluster of small stars between the bow of Sagittarius & the tail of
Scorpius: At simple view [with the naked eye], this cluster appears to form
a nebula without stars, but the slightest instrument which one employs to
examine it mahes one see that it is nothing but a cluster of small stars,
the diameter of which could be 15 arc minutes: I have determined its
position during its passage of the Meridian
: ist right ascension was
261d 10' 39", & its declination 32d 10' 34" southern.
[p. 455]
1764.May.23. RA: 261.10.39, Dec: 32.10.34.A, Diam: 0.15.
Cluster of small stars between the bow of Sagittarius & the tail of
Scorpius.
[Unpublished Observations of Messier's Nebulae and Clusters.
Scientific Papers, Vol. 2, p. 651]
1783, July 30. 20 feet, lowest power. I counted about 50 stars; it contains
the greatest variety of magnitudes of any nebula I recollect. The compound
eye-piece shows more of them varuiously and intermixed.
1786, Apr. 30 (Sw. 559). Contains several lines that seem to be drawing to
a center like a forming cluster.
Last Modification: June 24, 2006