Editing Hamal (section)

== Planetary system ==
In 2011, the likely presence of a planet in orbit around this star was reported by Byeong-Cheol Lee, et al. It was detected using the [[radial velocity method]], based upon measurements made between 2003 and 2010 at the [[Bohyunsan Optical Astronomy Observatory]] in Korea. The object has an [[orbital period]] of 381&nbsp;days and an [[orbital eccentricity|eccentricity]] of 0.25. The lower bound on this object's mass is about 1.8 times the mass of [[Jupiter]]. The estimated [[semi-major axis]] of the planet's orbit is 1.2&nbsp;[[astronomical unit]]s (AU),<ref name=aaa529_A134/> which would give it a [[periapsis]] distance of 0.9&nbsp;AU and an [[apoapsis]] distance of 1.5&nbsp;AU. By comparison, the star has a radius of 0.07&nbsp;AU.<ref name=orbit_note/>

{{OrbitboxPlanet begin
| table_ref = <ref name=EPEalfArib/>
}}
{{OrbitboxPlanet
| exoplanet = b
| mass = ≥ 1.8 ± 0.2
| period = 380.8 ± 0.3
| semimajor = 1.2
| eccentricity = 0.25 ± 0.03
}}
{{Orbitbox end}}