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Zeta Tucanae
Star in the constellation Tucana From Wikipedia, the free encyclopedia
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Zeta Tucanae, Latinized from ζ Tucanae, is a star in the constellation Tucana. It is a spectral class F9.5 main sequence star. Based upon parallax measurements by the Hipparcos spacecraft, it is approximately 28.0 light years from Earth.[11] This is one of the least variable stars observed during the Hipparcos mission.[4][12] The star is faintly visible to the naked eye, at an apparent magnitude of +4.23.
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Zeta Tucanae is a solar-type star, with similar mass, radius, luminosity, and effective temperature as the Sun, and has an estimated age of 5.3 billion years. Despite having a slightly lower mass, this star is more luminous than the Sun.[7] It is slightly metal-poor,[7] which means the portion of elements heavier than helium is smaller relative to the Sun. The solar-like qualities make it a target of interest for investigating the possible existence of a life-bearing planet.[12]
Zeta Tucanae has a rotation period of 15.65 days,[13][8] and possesses a magnetic activity cycle with period of approximately 950 days.[8][14]
The components of this star's space velocity are U = −60, V = −4 and W = −38 km/s. These correspond to the velocity toward the Galactic Center, the velocity along the direction of galactic rotation, and the velocity toward the north galactic pole, respectively.[15] It is orbiting through the galaxy at a mean distance of 8.4 kpc from the Galactic Center and with an orbital eccentricity of 0.16.[12]
Based upon an excess emission of infrared radiation at 70 micrometres, this system is believed to have a debris disk. It is radiating with a maximum temperature of 218 K, corresponding to a minimum distance from the star of 2.3 astronomical units.[16]
As of 2025, no planet has been discovered in orbit around this star.[8]
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