Arp 61

ARP 61 2018 Feb 11

Object:    Arp 61 (MCG+0-12-53 and -55) Date:               2018 Feb 11
Peculiarity:  Spiral with small high surface-brightness companion on arm.
Constellation:           Eridanus Time & altitude:        21.10 UT       30º
Catalogue data: Seeing (5 high):                               4/5
            R.A:                4h 37m Transparency (5 high):                   4/5
            Dec:                -2º 18 Telescope:     0.5m f4.1  Dob.
            Magnitudes:  15.1 and 15.5 Eyepiece:      8mm Ethos          x260
            Galaxy size (mins):  1.0 x 0.5 Filters:            None


Snow on the ground and a frost. The main component -53 is a fairly easy object with AV and seen some of the time with DV. It appeared as a long oval aligned NE-SW The secondary component -55 is just a spot, only glimpsed intermittently.

UGC 3105 is just E. It was seen as an oval mist without core and was about three times the length of Arp 61. I cannot find data on this galaxy, presumably it is a little brighter than the UGC’s cut-off magnitude with I understand is 14.5m. Many stars in this field, not all have been plotted. The bright star at E edge is 51Eri.