- Galaxies of the Arp Catalogue (Per) -

And (4) Cep (3) CVn (5) Lep (1) Peg (11) Tri (1)
Ari (3) Cet (1) Dra (1) LMi (4) Per (1) UMa (17)
Boo (1) Cnc (1) Gem (1) Lyn (2) Psc (5) UMi (1)
Cam (3) Com (3) Leo (10) Ori (1) Ser (2) Vir (6)

Arp 135 (GLXGRP)

Image source: DSS II (blue) - 10×10'
Name: Arp135
Constellation: Per
Coordinates: 02h40m24.01s / +39°03'47.70"

Group Members:
NGC1023 (UGC2154, H1.156) 9.3 mag 8.7x3.0' (82°)
NGC1023A 13.0 mag 1.6x1.4'
NGC1023A is the faint, oval brightening at the southeastern edge of NGC1023.

B 40mm, 8x, Bortle 4-, NELM 5.7+, SQM-L 20.9
The observation is only related to the bright NGC1023.

80mm f/6.25, 50x, Bortle 6-, NELM 5.0+, SQM-L 19.6
NGC1023: At 20x quite small, roundish to slightly oval. At 50x somewhat elongated with brighter center.

4.5" f/8, 90x, Bortle 6-, NELM 5.0+, SQM-L 19.6
NGC1023: At 36x oval with much brighter core. Located nearby an evident star pair. At 90x obviously elongated with very bright, bulgy core, spindle-shaped.

8" f/6, 80x, Bortle 4
NGC1023: Bright, compact core most obvious and seen with direct vision. Fainter outer extension seen with averted vision. Very elongated.

12.5" f/4.5, 96x, Bortle 3, SQM-L 21.3
NGC1023: Bright, compact, round nucleus with slightly oval, brighter core area. The much fainter outer regions appeared very elongated with averted vision.

33" f/3.9, 300x, Bortle 3, SQM-L 21.4
Besides the very bright NGC1023 I tried to see the faint companion NGC1023A. There was probably an irregularity in the halo of NGC1023 visible, but not sure.