| 31. | Secondary, ? 1694 B is a spectroscopic binary both A-type main sequence star.
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| 32. | HD 203338 is itself a spectroscopic binary with components Aa and Ab orbiting every 280 years.
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| 33. | In 1910, this was determined to be a single-lined spectroscopic binary star system.
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| 34. | Blanco 1 contains approximately 300 stars, around 170 of these being brighter than spectroscopic binaries.
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| 35. | In 1958, American astronomer Horace W . Babcock discovered that this is a spectroscopic binary star.
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| 36. | "' 31 Camelopardalis "'is an eclipsing spectroscopic binary in the constellation Camelopardalis.
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| 37. | The primary star consists of a double-lined spectroscopic binary with a more distant tertiary companion.
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| 38. | The spectroscopic binary companion star is an A2V dwarf of about 2 solar masses and 30 luminosity.
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| 39. | "' Xi Cygni "'is a spectroscopic binary star in the constellation Cygnus.
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| 40. | "' 35 Cygni "'is a spectroscopic binary star in the constellation Cygnus.
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