| 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 |
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Notes: 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. |
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