Abell 84

2019-09-03, Spruce Knob, 4800 ft a.s.l. Clear, relatively dry and calm. Transparency above average, seeing 3-4 arcsec. SQM 21.7. 20" F/4.

Abell 84, DSS

Abell 84 (PN, Cas). Appears similar in 13 and 5.5 mm with OIII. Two star pairs to the W and NW. Star embedded on the E edge. That edge appears enhanced as a thin arc passing through the star. Opposite edge enhanced too but connected with the center, appearing as a very thick annular segment. Sketch

Abell 83

2019-09-03, Spruce Knob, 4800 ft a.s.l. Clear, relatively dry and calm. Transparency above average, seeing 3-4 arcsec. SQM 21.7. 20" F/4.

Abell 83, DSS

Abell 83 (PN, Cas). Fairly obvious, round in 13 mm with OIII (Orion US). As wide as the S side of the rhombus of faint stars to the N. In 5.5 mm with OIII, a broken annulus with ESE and WNW segments. Threshold star less than the diameter to the NW. Sketch

Abell 8

2019-09-03, Spruce Knob, 4800 ft a.s.l. Clear, relatively dry and calm. Transparency above average, seeing 3-4 arcsec. SQM 21.7. 20" F/4. Abell 8 (PN, Aur). Invisible in 13 mm without filter. With OIII, appears round and smaller than on DSS NW of an unequal star pair (detached from it). Alternately, a larger annulus is suspected. 5.5 mm, OIII: hints of partial annulus - an arc just N of the fainter star. 8 mm, OIII: more definite arc NW of the star pair, convex to the N. Two similar close unequal double stars farther NW. Sketch