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 | |
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]
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 | |
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]