| Object: ARP 70 (VV 341a & b) | Date: 2015 September 20 |
| Peculiarity: Spiral with small high surface-brightness companion on arm. | |
| Constellation: Pisces | Time & altitude: 00.30 UT 67º |
| Catalogue data: | Seeing (5 high): 4/5 |
| R.A: 1h 24m | Transparency (5 high): 5/5 |
| Dec: +30º 47 | Telescope: 0.5m f4.1 Dob. |
| Magnitudes: 15.0 & 17.0 | Eyepiece: 8mm Ethos x260 |
| Galaxy size (mins): 1.7 x 0.6 & 0.4 x 0.2 | Filters: Lumicon Deep Sky made no difference. |
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Notes: A rare night of very transparent air. In the zenith M31is perhaps the best I’ve seen from England. However a series of aircraft vapour trails running N-S and drifting from E-W are interfering now. As with this session’s previous target, Arp 98, seeing this object was still a struggle. I could see VV341a with AV for about half the time. It is an oval haze ratio 2:1 with the major axis aligned NW-SE. I could not see the hooked arm. VV341b was not seen, not surprising given it is 17.0m. |
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