Object: Nonex-open cluster NGC 6991 Constell: CYG RA: 20h 54.5m Decl: +47° 17' Epoch: 2000 Mag: Size: 5' Type: II 2 p (own) Observer: Jere Kahanpää Obs. place: Jyväskylä, Finland Date/Time: 12./13.8.1996, 01.20 Telescope: N 205/1000 Magn: 80x Filter: Field: 37' NE Lim.mag: 5.2m Background sky: 3-4 Seeing: 2-3 Weather: +10 °C, no Moon. Brightness: 2 Alt: 75° Description: x = NGC position. The original descr. from W. Herschel: "A star 6m ... not in the middle but following. Surrounded by many cst. forming a brilliant sc. Cl." The mag. 6 star W.H. mentions is near the NE edge of the field. The field includes at least 2 candidates. A) A diam. 7' triangular cluster of about 20 stars mag. 11...13. This is a nice but unconcentrated group near the center of the field. The brighest one is on the SW edge. The NGC position is very near the brightest star of this group. Est. Tr-type III 2 p. B) A bit brighter but not as well detached group of stars 10' NW of the first one. Includes 20 stars mag. 9...11. Tr-type IV 2 p. This group is visible in the drawing as a slight concentration of bright stars in the NW quarter. Position RA 20h 54.4m (2000) Dekl. +47° 26.7' I'm not quite sure of what W.H. refers to. Maybe the whole field could be the "brilliant sc. Cl.". On the other hand A) is quite a striking group. The MW is very rich here but star density drops dramatically towards E.