Description: Complex nebular detectable in the southern part of the constellation, north of subgiant red Antares; it is a small part of the Rho Ophiuchi cloud complex directly illuminated by the radiation of HD 147889, a blue giant of spectral B2III located anterior to the densest part of the cloud, but completely surrounded by her gas. This star has a very red spectrum, which reveals that its light is filtered and partly masked by the cloud in which is immersed; his young age indicates that originated from a process of star formation inside the same Rho Ophiuchi cloud complex. The measurements of the parallax, that provides a distance of 136 parsecs (443 light years) from the solar system, namely identical to that of the cloud, provides further evidence of the link between these two objects. Source: Wikipedia