Arp 1

ARP 1+285

Object:            ARP 1   (NGC 2857) Date:               2015 January 24
Peculiarity:    Low surface-brightness spiral.
Constellation:           Ursa Major Time & altitude: 22.45 UT     68º
Catalogue data: Seeing (5 high):                               4/5
            R.A:                9h 25m Transparency (5 high):                   4/5
            Dec:                +49º 21 Telescope:                 0.5m f4.1  Dob.
            Magnitude:    12.2 Eyepiece:      8mm Ethos       x260
            Galaxy size (mins):  2.2 x 2.2 Filters:            Lumicon Deep Sky


Lies just E of a trapezoid of faintish stars which acts as an essential position marker. Very difficult to see anything. Using AV all I can glimpse is a faint spot maybe 25% of the time.  Megastar catalogues the magnitude at 12.9 not 12.2 which partly explains the difficulty. However I am aware others using similar kit have seen faint spiral arms.

In the drawing, Arp 1 is the right-hand of the three galaxies shown. The pair to its left are the double galaxies of Arp 285.