Arp 220

ARP 220 2015 Aug 8

Object:    ARP 220         (IC 4553) Date:               2015 August 8
Peculiarity:    Adjacent loops.
Constellation:           Serpens Time & altitude: 22.30 UT     35º
Catalogue data: Seeing (5 high):                               4/5
            R.A:                15h 35m Transparency (5 high):                   4/5
            Dec:                +23º 30 Telescope:     0.5m f4.1 Dob.
            Magnitude:   13.1 Eyepiece:      8mm Ethos      x260
            Galaxy size (mins):  1.5 x 1.2 Filters:            Lumicon Deep Sky.


Difficult, even with the Deep Sky filter and despite its catalogued magnitude and the decent weather conditions. Tried the Lumicon UHC filter but it made the galaxy disappear. It is classic “breath on a mirror”. Its shape is like this ‘D’, not like a half-moon. The straight side is aligned NNW-SSE.