Rho Ophiuchi nebula – Antares
isa multiple star system in the constellation Ophiuchus. The centralsystem has an apparent magnitude of 4.63. Based on the centralsystem’s parallax of 9.03 mas, it is located about 360 light-years(110 parsecs) away. The other stars in the system are slightlyfarther away. Rho Ophiuchi is the namesake of the Rho Ophiuchi