Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Telescopium |
Right ascension | 18h 28m 49.85980s[1] |
Declination | −49° 04′ 14.1122″[1] |
Apparent magnitude (V) | +4.13[2] |
Characteristics | |
Spectral type | K1 III-IV[3] |
U−B color index | +0.82[4] |
B−V color index | +1.02[4] |
Astrometry | |
Radial velocity (Rv) | −30.6[5] km/s |
Proper motion (μ) | RA: +139.10[1] mas/yr Dec.: −228.66[1] mas/yr |
Parallax (π) | 25.84 ± 0.21 mas[1] |
Distance | 126 ± 1 ly (38.7 ± 0.3 pc) |
Absolute magnitude (MV) | 1.171[2] |
Details | |
Mass | 1.53[2] M☉ |
Radius | 9[6] R☉ |
Surface gravity (log g) | 2.78±0.09[7] cgs |
Temperature | 4,801±39[7] K |
Metallicity [Fe/H] | −0.19±0.03[7] dex |
Other designations | |
Database references | |
SIMBAD | data |
Zeta Telescopii (ζ Telescopii) is the second-brightest star in the southern constellation of Telescopium. It is a solitary,[9] orange-hued star that is visible to the naked eye with an apparent visual magnitude of +4.13.[2] Based upon an annual parallax shift of 25.84 mas as seen from Earth,[1] it is located around 127 light years from the Sun.
This is a red clump[2] giant star of spectral type K1 III-IV.[3] The measured angular diameter is 2.16±0.11 mas.[10] At its estimated distance, this yields a physical size of about 9 times the radius of the Sun.[6] It is around 1.53[2] times as massive as the Sun and it shines at an effective temperature of 4,801 K.[7]