![]() The angular size of their orbit is only 1.396 arcseconds, which translates into an average physical distance of about 33.5 astronomical units. The stars come within 2 astronomical units of each other (two Earth-Sun distances) and drift as far apart as 65 astronomical units. The highly eccentric orbit makes it very unlikely for any planets to form in the system. They orbit each other with a period of 87.58 years and an eccentricity of 0.950. Individually, the stars have apparent magnitudes of 3.05 and 3.27. Eta Ophiuchi A has 2.966 solar masses, while Eta Ophiuchi B has 3.478 solar masses. The components C and D in the star system are catalogued as UCAC4 372-080717 and UCAC2 26022336.Įta Ophiuchi consists of two white stars of the spectral type A1 IV with a total mass of about 6.09 solar masses. Its two components, Eta Ophiuchi A (formally named Sabik) and Eta Ophiuchi B, have the designations WDS J17104-1544A and WDS J17104-1544B and the binary itself is catalogued as WDS J17104-1544AB. Star systemĮta Ophiuchi is a binary star in a multiple system designated WDS J17104-1544 in the Washington Double Star Catalog. It marks the right knee of Ophiuchus, the celestial serpent bearer. Sabik lies at an approximate distance of 88 light years from Earth. With a combined apparent magnitude of 2.43, it is the second brightest point of light in the constellation, after Rasalhague. Sabik, Eta Ophiuchi (η Oph), is a binary star system composed of two white subgiant stars located in the constellation Ophiuchus. ![]()
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