| Designation(s) | Arp 13, NGC 7448 |
| Object Type(s) | Galaxy |
| Relevant Catalog(s) | All (Chron), Arp, NGC |
| Arp Category | Spiral galaxies with detached segments |
| Obs. Lat/Long | 42° 17', 073° 57' |
| Constellation | Pegasus |
| Date and Time Observed | 2024-10-24 20:57:00 |
| Instrument | EdgeHD 8" w/f7 reducer-1,422mm FL |
| Camera | Player One Apollo Mini |
| Image Details | Up is 279.4 degrees E of N (approximately WNW). Total integration time was 30m 30s. Exposures 15s@300g, UV/IR Cut Filter. Darks subtracted, no flats. Dithered and recentered in SharpCap. No guiding. |
| Description | Arp categorized this as "Spiral Galaxies with detached segments". Presumably this refers to the bright lobes outside of the core. Four, arrayed in an arc from 0° to 100° in the image (280° to 20° in the sky) are fully "detached" from the core, and quite evident in my capture. Another five inner lobes, less distinct, abut the central core. I presume the outer lobes are dwarf galaxies being absorbed, while the inner lobes are segments of the original spiral structure getting pulled apart by the gravitational influence of the merging dwarfs. I thought the original negative plate from the Atlas was not terribly informative, so I "developed" it in Affinity Photo using the "invert" and "levels" tool. No sharpening or smoothing was applied to the Arp capture. |
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