6717 6715
Sgr
☀7.5mag
Ø 10'

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John Herschel discovered NGC 6716 = h2021 on 14 Jul 1830 and recorded "a p rich cluster, figure like the letter S, 7' in extent. Stars 9...13m. Counted 40 of them." His position is accurate.

200/250mm - 8" 20 stars mag 10-13 including a row of stars at the north edge.

400/500mm - 17.5" (5/10/91): about 40 stars visible in a 9' diameter, bright, fairly large but scattered. Divided in two groups; the SSW group includes a mag 8 star and two mag 10 stars. A mag 9 star is at the NE edge of the NNW group, which also includes several mag 10-12 stars in a curved arc. Pretty empty between these two groups with just four stars in the center. Not very impressive.

Notes by Steve Gottlieb