Global InformationZeta Tucanae information
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Tucana |
| Right ascension | 00h 20m 04.25995s[1] |
| Declination | −64° 52′ 29.2549″[1] |
| Apparent magnitude (V) | 4.23 |
| Characteristics | |
| Spectral type | F9.5 V[2] |
| U−B color index | 0.02[3] |
| B−V color index | 0.58[3] |
| Variable type | None[4] |
| Astrometry | |
| Radial velocity (Rv) | 8.8 ± 0.02[5] km/s |
| Proper motion (μ) | RA: 1,707.42[1] mas/yr Dec.: 1,164.30[1] mas/yr |
| Parallax (π) | 116.46 ± 0.16 mas[1] |
| Distance | 28.01 ± 0.04 ly (8.59 ± 0.01 pc) |
| Absolute magnitude (MV) | 4.67[6] |
| Details | |
| Mass | 0.99±0.02[7] M☉ |
| Radius | 1.08±0.08[8] R☉ |
| Luminosity | 1.26[8] L☉ |
| Surface gravity (log g) | 4.48[9] cgs |
| Temperature | 5,970[9] K |
| Metallicity [Fe/H] | −0.18[9] dex |
| Rotation | 31.1±0.1 d[10] |
| Rotational velocity (v sin i) | 3.0[11] km/s |
| Age | 2.1–3.02[12][13] Gyr |
| Other designations | |
ζ Tuc, FK5 10, GC 401, GJ 17, HD 1581, HIP 1599, HR 77, SAO 248163, LHS 5, LTT 167[14] | |
| Database references | |
| SIMBAD | data |
Zeta Tucanae, Latinized from ζ Tucanae, is a star in the constellation Tucana. It is a spectral class F9.5 main sequence star with an apparent magnitude of +4.23. Despite having a slightly lower mass, this star is more luminous than the Sun.[7] Based upon parallax measurements by the Hipparcos spacecraft, it is approximately 28.0 light years from Earth.[1] This is one of the least variable stars observed during the Hipparcos mission.[4][15]
The composition and mass of this star are very similar to the Sun, with a slightly lower mass and an estimated age of three billion years. The solar-like qualities make it a target of interest for investigating the possible existence of a life-bearing planet.[15]
Based upon an excess emission of infrared radiation at 70 micrometres, this system is believed to have a debris disk. The disk is orbiting the star at a minimum radius of 2.3 astronomical units. It is radiating with a maximum temperature of 218 K.[12] As of 2009, no planet has been discovered in orbit around this star.[16]
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.[17] 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.[15]
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