Arp 280

ARP 280 2017 Mar 21

Object:  ARP 280 (NGC 3769 & 69A) Date:          2017 March 21
Peculiarity:    Interacting double galaxies.
Constellation:           Ursa Major Time & altitude:   21.20 UT         68º
Catalogue data: Seeing (5 high):                                  3/5
            R.A:                11h 38m Transparency (5 high):                  3/5
            Dec:                47º 54 Telescope:     0.5m f4.1 Dob.
            Magnitudes:  12.6 & 14.7 Eyepiece:      17mm Ethos    x120                                                                    8mm Ethos      x260
            Galaxy sizes (mins):  3.3×0.9 & 1×0.4 Filters:  With and without Lumicon  Deep-Sky.


Conditions looked promising to the unaided eye but were not that special through the telescope.

Arp 280 shows as an angular splinter of light with the sharp end to the S. The edges are well defined. There is a noticeable core and mottling.  The companion galaxy was very difficult, barely visible and insignificant. I could not decide whether or not it was in contact with Arp 280.