IC 4639 NGC 6591
Her
☀15.5mag
Ø 30'' / 6''

Lewis Swift discovered IC 1191 = Sw. VII-75 on 7 Jun 1888 and recorded "eeeF; S; lE; another [IC 1190] and [NGC] 6061 nr in line." Although his position for[IC 1190 is poor, his position for IC 1191 is just 7 seconds of RA too small. Harold Corwin gives the dimensions of the brighter component as 27"x7" in PASP, Vol 83 and notes "IC 1191 is also a double object similar to IC 1188 (separation = 11 arcseconds). The fainter companion lies at R.A. 16h 04m 14.8s, +18° 24' 6'' (1950)."

600/800mm - 24" (6/14/15): very faint, small, 18" diameter, no structure (not seen as double). Located 3.3' NE of NGC 6061 in the north section of AGC 2151.

Notes by Steve Gottlieb