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| Catalogue and alternative designations |
Westerlund 2, ESO 127-18 |
| Type | Open cluster |
| Position | 10 23 58, --57 45 49 |
| Constellation | Vela |
| Camera and Telescope | STXL16200 and 36.8 cm Ritchey Chretien |
| Focal Ratio | F9 |
| Exposure Details | This is a HaRGB image with Hydrogen Alpha = 160 minutes, Red = Green = Blue = 60 minutes All binned 2x2 and Astrodon filters were used. |
| Description | Westerlund 2 is an obscured young compact star cluster and is the second member of the Westerlund 2 member catalogue. The distance is approxinately 20, 000 light years and the apparent magnitude is 10.5. The prominent nebulosity is RCW 49. Just off the frame at the bottom is 6th magnitude SAO 238031. |