Abell 82

2019-08-29, Spruce Knob, 4800 ft. Clear, relatively calm, humidity moderate. Transparency 10/10 to 6/10. SQM 21.6-21.7. 20" F/4. Abell 82, Cas. 13 mm + OIII. Bright. Faint stars involved. Bilobed. SE of a brighter star. NW segment longer and has an enhanced N tip. SE segment visible primarily S of the star on the SE edge. Sketch

Abell 3

This red nebula is barely above background in PANSTARRS g. The extended triangle E of the nebula is formed by mag. 12-15 stars. This is an object for extremely large telescopes. Beware of false positives. Observing under excellent conditions (4,800 ft a.s.l., SQM 21.6, aperture 20"), I noticed and sketched two arcs, the W one brighter, which resembled the nebula. Moreover, the arcs were only visible with an OIII filter. However, the arcs were slightly larger than the nebula and offset somewhat to the W, which showed them to be unresolved light from the group of Vm 17-18 stars (the E "arc") and Vm 16 stars (the W "arc"). The phenomenon of enhancement of unresolved starlight by an narrowband filter in a star-rich field is due to a better contrast perception of background variations when the visible point sources are suppressed.

Abell 2

Abell 2, DSS

2019-08-29, Spruce Knob, 4800 ft. Clear, relatively calm, humidity moderate. Transparency 10/10 to 6/10. SQM 21.6-21.7. 20" F/4. Abell 2, Cas. Immediately visible, bright. 8 mm with OIII. Slightly elongated NS, vaguely annular with a broader N side and weaker S side. Sketch

Abell 52

Abell 52, DSS

2019-08-29, Spruce Knob, 4800 ft. Clear, relatively calm, humidity moderate. Transparency 10/10 to 6/10. SQM 21.6-21.7. 20" F/4. Abell 52, Aql. Visible in 8 mm, elongated EW 1:2. Visible also with OIII, same appearance, slightly kidney-shaped, convex to N, and E end brighter and thicker. Sketch

Abell 48

Abell 48, DSS

2019-08-29, Spruce Knob, 4800 ft. Clear, relatively calm, humidity moderate. Transparency 10/10 to 6/10. SQM 21.6-21.7. 20" F/4. Abell 48. Aql. Round, faint, ~30 arcsec. Doubtful with 8 mm, many faint stars. Not seen with OIII. With 5.5 mm, visible and responds to OIII. Hints of very slight NNE-SSW extension and annularity. Sketch

Hickson 2

Hickson 2, SDSS

Hickson 2 (Psc). 2019-08-29, Spruce Knob, 4800 ft. Clear, relatively calm, humidity moderate. Transparency 10/10 to 6/10. SQM 21.6-21.7. 20" F/4. A, B, C and elongation in A and C visible already with 13 mm. A and B bright and well-defined, C has no concentration. 5.5 mm brings out D. D very slightly extended NE-SW. C has a core on E side and a halo extended to the W with a well-defined, possibly enhanced, edge. Overall elongated NS. A elongated NS rather strongly, has a thin NS core, ENE enhanced edge of halo leading to a more defined compact enhancement on N end of galaxy, and an enhanced edge from SW around S end. B very slightly extended parallel to A. Sketch

Hicksons in And-Psc-Cet

2019-08-29, Spruce Knob, 4800 ft. Clear, relatively calm, humidity moderate. Transparency 10/10 to 6/10. SQM 21.6-21.7. 20" F/4.

Hickson 5, SDSS

Hickson 5. Psc. Group obvious with 13 mm, NGC 190 (i.e. A) dominates and has a halo in addition to a core sized similarly to B and C. The halo is enhanced on W and E edges. D glimpsed but not definite. 5.5 mm: Relatively compact enhancement on WNW edge of the halo in A, two such enhancements in contact form the E and SE edge. B on S edge. D definite and elongated NE-SW without concentration. Appears larger than on [the] DSS [print]. Sketch

Hickson 3, SDSS

Hickson 3 (Cet). A strongly elongated NW-SE, appears larger than on DSS print. B slightly elongated ENE-WSW. C fainter, elongated like A. D brighter, compact, very slightly elongated NS. Sketch

Hickson 1, SDSS

Hickson 1 (And). AB visible as one extended object in 13 mm. In 5.5 mm, A and B are two almost touching objects (i.e. only the core of A is seen). C is just SW of the line between 2 stars W of AB. D is actually easier to see, as it is farther separated from the stars, to the W on the A-C line. [Not sketched]