| 41. | HR 4729 is itself a close spectroscopic binary system with a period of 1 day 5 hours.
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| 42. | Both members of the spectroscopic binary ? Vel A are evolved stars that have left the main sequence.
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| 43. | This, in turn, has made determination the orbital period of A's spectroscopic binary difficult.
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| 44. | This is a spectroscopic binary with an angular separation of 0.2 arcseconds between the two components.
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| 45. | RT Aurigae has been suspected to be a spectroscopic binary system, but this has not been confirmed.
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| 46. | This is a single-lined spectroscopic binary system, but the secondary has been detected using interferometry.
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| 47. | The star is a low-amplitude spectroscopic binary, with the secondary being a brown dwarf candidate.
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| 48. | The primary star is a spectroscopic binary with period 30.4 days and eccentricity 0.63.
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| 49. | "' WR 9 "'is a spectroscopic binary in the constellation class O star.
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| 50. | Such a system is known as a double-lined spectroscopic binary ( often denoted " SB2 " ).
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