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'''HD 135438''' is a [[red giant]] star in the northern [[constellation]] of [[Boötes]]. With an [[apparent magnitude]] of 6.0, it lies about 650 [[light-year]]s away. |
'''HD 135438''' is a [[red giant]] star in the northern [[constellation]] of [[Boötes]]. With an [[apparent magnitude]] of 6.0, it lies about 650 [[light-year]]s away. HD 135438 has a magnitude 9.36 visual companion at an [[angular separation]] of {{val|118.2|ul=″}} along a [[position angle]] of 158° (as of 2012).<ref name="WDSC2014" /> [[Gaia Data Release 3]] parallaxes indicate that the visual companion is an unrelated background star.<ref name="dr3b" /> |
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The star displays periodic [[radial velocity]] variations, likely caused by both intrinsic variability and an orbiting companion star, making this a probable single-lined [[spectroscopic binary]]. The companion star has at least half the [[Solar mass|mass of the Sun]], and has an [[orbital eccentricity|eccentric]] orbit with a period of about {{convert|8500|d|yr|abbr=none}}.<ref name="Lee2023"/> |
The star displays periodic [[radial velocity]] variations, likely caused by both intrinsic variability and an orbiting companion star, making this a probable single-lined [[spectroscopic binary]]. The companion star has at least half the [[Solar mass|mass of the Sun]], and has an [[orbital eccentricity|eccentric]] orbit with a period of about {{convert|8500|d|yr|abbr=none}}.<ref name="Lee2023"/> |
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HD 135438 has a magnitude 9.36 visual companion at an [[angular separation]] of {{val|118.2|ul=″}} along a [[position angle]] of 158° (as of 2012).<ref name=WDSC2014/> [[Gaia Data Release 3]] parallaxes indicate that the visual companion is an unrelated background star.<ref name=dr3b/> |
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==References== |
==References== |
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