Tau Ophiuchi [SEP] constellation
Tau Ophiuchi
Tau Ophiuchi (τ Oph) is a multiple star in the constellation Ophiuchus, approximately 167 light years away based on parallax. Its two main components are two yellow-white main sequence stars, A, of magnitude 5.24 and class F2V, and B, of magnitude 5.94 and class F5V, orbiting each other with a period of 257 years and eccentricity around 0.77. A is reported as a spectroscopic binary with a smaller star of 0.29 solar masses orbiting it every 186 days. An additional component, C,
part of (), meaning "Left Wall of Heavenly Market Enclosure." The stars in this group include ν Ophiuchi, δ Herculis, λ Herculis, μ Herculis, ο Herculis, 112 Herculis, ζ Aquilae, θ Serpentis, η Serpentis, ξ Serpentis and η Ophiuchi. Consequently, ν Ophiuchi itself is known as (, ), and together with ζ Capricorni represents the state Yan (燕) in the "Twelve States" constellation.
See also.
- Nu Ophiuchi in fiction
- Tau Geminorum