Discovered by Pierre Méchain on August 27, 1780.
[PT 1818, p. 448-449; SP2 p. 600]
The 75th of the Connoissance. [M 75 = NGC 6864]
"1799, 7 feet finder. It is just but visible."
"1799, 7 feet telescope. There is not the least appearance of its consisting
of stars, but it resembles other clusters of this kind, when they are seen
with low space-penetrating and magnifying powers."
"1810, 10 feet telescope. With 71 it is small and cometic."
"1784, 1785, 20 feet Newtonian. Easily resolvable; some of the stars are
visible."
"1810, 20 feet, front view. It is a globular cluster."
"1799, 1810, large 10 feet. Its diameter with 171 is 1' 48"; with 220 it is
2' 0"."
By the observation of the 20 feet Newtonian telescope, the profundity of this
cluster must be of the 743d order.
Sweep 298 (September 22, 1830)
RA 19h 56m 2.7s, NPD 112d 23' 38" (1830.0)
[Right Ascension and North Polar Distance]
pB; R; psvmbM; r; 90".
pretty bright; round; pretty ssuddenly very much brighter toward the middle;
round; 90" [diameter].
Sweep 275 (July 28, 1830)
RA 19h 56m 2.9s, NPD 112d 24' 10" (1830.0)
[Right Ascension and North Polar Distance]
Not B; S; R; psbM; 2' diam; r, but not resolved. An insignificant object.
Not bright; small; round; pretty suddenly brighter toward the middle; 2'
diameter; mottled, but not resolved. An insignificant object.
Last Modification: October 21, 2005