Several RCW catalog objects can be found in this image located in the constellation of Crux in the Southern Hemisphere. RCW 68 is just above center and quite faint. Much brighter RCW 71 (Gum 46) is at the left side and RCM 63 is below and left of center. RCW 65 and RCW 66 are located in the top right quadrant of the image.
The RCW Catalogue (from Rodgers, Campbell & Whiteoak) is an astronomical catalogue of Hα-emission regions in the southern Milky Way, described in (Rodgers et al. 1960). It contains 182 objects, including many of the earlier Gum catalogue (84 items) objects.
The later Caldwell catalogue included some objects from the RCW catalogue. There is also some overlap with the Sharpless catalogue-2 (312 items), although that primarily covered the northern hemisphere, whereas RCW and Gum primarily covered the southern hemisphere.
The RCW catalogue was compiled by Alexander William Rodgers, Colin T. Campbell and John Bartlett Whiteoak. They catalogued southern nebulae while working under Bart Bok at the Mount Stromlo Observatory in Australia in the 1960s.

Telescope: Astro Physics 155EDF (TCC) f5.4
Mount: Astro Physics 1600GTO
Camera: FLI PL29050 / CFW2-7
Guider: Agena Starguide II / ZWO ASI178MM
Filters: Astrodon II 50mm LRGB

L: 73×10 mins = 730 mins, R: 23×10 mins = 230 mins, G: 22×10 mins = 220 mins, B: 22×10 mins = 220 mins

Total Imaging Time: 23h 20m

Data Imaged remotely on 6 nights during April & May 2024.
Imaged from Observatorio El Sauce, Chile, in partnership with Fred Espenak.
Data acquisition & Processing by David Churchill.

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