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| Catalogue and alternative designations | IC
4642, Shapley 2, ESO 180-4
|
| Type | Planetary nebula |
| Position | 17 11 44, - 55 24 02 |
| Constellation | Ara |
| Camera and Telescope | STXL16200 and 36.8cm Ritchey Chretien |
| Focal Ratio | F9 |
| Exposure Details | LRGB colorised with Hydrogen Alpha and Oxygen III. Luminance = 130 minutes, R=G=B=20 minutes. Hydrogen Alpha = 180 minutes, OIII = 300 minutes with Astrodon series 2 filters. Luminance unbinned, colours binned 2x2 |
| Description | Shapley
2 is one of the three planetary
nebulae in the Shapley
catalogue. It has a
photographic magnitude of 13.4 and is about
24" in diameter although
there are some outer OIII
structures visible. The
central star is magnitude 16.
The possible outer halo around this planetary nebula was discovered by the Galactic Planetary Nebula Halo Survey (GPNHS) team in July 2015 and possible OIII blobs in June 2017.
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