| Object: ARP 155 (NGC 3656 & companion) | Date: 2017 March 21 |
| Peculiarity: Disturbed with interior absorption. | |
| Constellation: Ursa Major | Time & altitude: 21.45 UT 75º |
| Catalogue data: | Seeing (5 high): 3/5 |
| R.A: 11h 24m | Transparency (5 high): 3/5 |
| Dec: 53º 50 | Telescope: 0.5m f4.1 Dob. |
| Magnitude: 12.5 | Eyepiece: 8mm Ethos x260 |
| Galaxy size (mins): 1.6 x 1.6 | Filters: None. |
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Notes: Conditions looked promising to the unaided eye but were not that special through the telescope. This is a conspicuous galaxy. It is round, but missing a segment on the side opposite to the adjacent 12th mag. star. The half of the galaxy next to the star has a well-defined ‘hard’ edge. The opposite edge is more diffuse. There appeared to be some fine linear striations running across the galaxy E-W. There is no core. Arp’s Atlas shows a tiny companion galaxy on the S edge of Arp 155. It was not seen. |
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