71 Ophiuchi
71 Ophiuchi is a single star in the equatorial constellation of Ophiuchus. It is visible to the naked eye as a faint, yellow-hued point of light with an apparent visual magnitude of 4.64. The star is located approximately 273 light years away from the Sun based on parallax, and is moving closer with a radial velocity of −3 km/s. At the estimated age of 400 million years, this is an aging giant star with a stellar classification of G8III, having exhausted the supply of hydrogen at its core and expanded to around 13 times the Sun's radius. It is a red clump giant, which means it is on the horizontal branch and is generating energy through helium fusion at its core. The star has 2.9 times the mass of the Sun and is radiating 89 times the Sun's luminosity from its swollen photosphere at an effective temperature of 5,001 K. References G-type giants Horizontal-branch stars Ophiuchus BD+08 3582 Ophiuchi, 71 165760 088765 6770