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70 Ophiuchi

Star system
70 Ophiuchi is a binary star system located 16.6 light years away from the Earth. It is in the constellation Ophiuchus. At magnitude 4 it appears as a dim star visible to the unaided eye away from city lights. Wikipedia
Constellation: Ophiuchus
Magnitude: 1.79
Radius: 0.91 ± 0.03 R
Distance: 16.6 light years away
Absolute magnitude (MV): +5.49
Age: 1.9 Gyr
Apparent magnitude (B): 4.97/7.26