Zeta Telescopii
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 28m 49.85937s |
| Declination | −49° 04′ 14.1180″ |
| Apparent magnitude (V) | +4.13 |
| Characteristics | |
| Evolutionary stage | red clump |
| Spectral type | K1 III-IV |
| U−B color index | +0.82 |
| B−V color index | +1.02 |
| Astrometry | |
| Radial velocity (Rv) | −29.75±0.19 km/s |
| Proper motion (μ) | RA: +139.344 mas/yr Dec.: −229.844 mas/yr |
| Parallax (π) | 26.6984±0.1406 mas |
| Distance | 122.2 ± 0.6 ly (37.5 ± 0.2 pc) |
| Absolute magnitude (MV) | 1.27±0.03 |
| Details | |
| Mass | 1.41±0.07 M☉ |
| Radius | 8.27±0.15 R☉ |
| Luminosity | 33.30±0.85 L☉ |
| Surface gravity (log g) | 2.84±0.077 cgs |
| Temperature | 4,824±31 K |
| Metallicity [Fe/H] | −0.126±0.022 dex |
| Other designations | |
| ζ Tel, CD−49°12153, HD 169767, HIP 90568, HR 6905, SAO 229047 | |
| Database references | |
| SIMBAD | data |
Zeta Telescopii (ζ Telescopii) is the second-brightest star in the southern constellation of Telescopium. It is a solitary, orange-hued star that is visible to the naked eye with an apparent visual magnitude of +4.13. Based upon an annual parallax shift of 26.7 mas as seen from Earth, it is located around 122 light years from the Sun.
This is a red clump giant star of spectral type K1 III-IV. It is just 40% more massive than the Sun, but has a radius eight times larger and shines with about 30 times its luminosity. The surface of Zeta Telescopii has an effective temperature of 4,824 K, giving it the orange hue typical of K-type stars.