planet was never confirmed and the signal the authors had found could have been due to intrinsic stellar activity from the star's young age. If confirmed, the planet would be within the star's habitable zone. An examination of this system in 2010 using the MMT telescope fitted with adaptive optics failed to detect a planetary companion. The habitable zone for this star, defined where liquid water could be present on an Earth-like planet, is at a radius of 0.26–0.56 AU, where 1 AU is the average distance from the Earth to the Sun. The star is among five nearby K-type stars of a type in a 'sweet spot’ between Sun-analog stars and M stars for the likelihood of evolved life, per analysis of Giada Arney from NASA’s Goddard Space Flight Center. See also Stephen Groombridge List of nearest stars Notes References Notes External links K-type main-sequence stars Local Bubble Ursa Major (constellation) Flare stars Hypothetical planetary systems 088230 049908 0380 1618 BD+50 1725 TIC objects