Arp 31

ARP 31 2015 Oct 8

Object:            ARP 31   (IC 167) Date:               2015 October 8
Peculiarity:    Integral sign spiral.
Constellation:           Aries Time & altitude:   21.40 UT     45º
Catalogue data: Seeing (5 high):                               3/5
            R.A:                1h 51m Transparency (5 high):                   3/5
            Dec:                +21º 55 Telescope:     0.5m f4.1 Dob.
            Magnitude:    13.6 Eyepiece:      8mm Ethos      x260
            Galaxy size (mins):  2.6 x 1.4 Filters:            Lumicon Deep Sky


Almost invisible. I fancied it might be banana shaped as shown in the drawing but with very low confidence. The nearby galaxy NGC 694 (a.k.a. Markarian 363), which is not part of the Arp object, looked much more obvious and interesting despite a slightly fainter catalogue magnitude of 13.7m. It appeared as an oval lying NS, with a sharp E edge and a diffuse W edge.