Rho Ophiuchi Cloud Complex

Rho Ophiuchi Cloud Complex (or Ophiuchus Molecular Cloud) is a dark nebula a degree south of the star Rho Ophiuchi in the constellation Ophiuchus. It is a star-forming region about 140 parsecs from here. Characteristics:

• Ophiuchus - constellation.
• 16h28m06s - right ascension.
• -24deg32m30s - declination.
• 460 ly - distance.
• 4.5×6.5 degrees - angular dimensions.

The designator prefix ROX, used for some stars within the cloud complex, stands for Rho Ophiuchi X-ray source, and ROXs for the optical counterpart to such a source.