Zeta Telescopii
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 25.84 mas as seen from Earth, it is located around 127 light years from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 28m 49.85980s |
| Declination | −49° 04′ 14.1122″ |
| Apparent magnitude (V) | +4.13 |
| Characteristics | |
| Spectral type | K1 III-IV |
| U−B color index | +0.82 |
| B−V color index | +1.02 |
| Astrometry | |
| Radial velocity (Rv) | −30.6 km/s |
| Proper motion (μ) | RA: +139.10 mas/yr Dec.: −228.66 mas/yr |
| Parallax (π) | 25.84 ± 0.21 mas |
| Distance | 126 ± 1 ly (38.7 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.171 |
| Details | |
| Mass | 1.53 M☉ |
| Radius | 9 R☉ |
| Surface gravity (log g) | 2.78±0.09 cgs |
| Temperature | 4,801±39 K |
| Metallicity [Fe/H] | −0.19±0.03 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a red clump giant star of spectral type K1 III-IV. The measured angular diameter is 2.16±0.11 mas. At its estimated distance, this yields a physical size of about 9 times the radius of the Sun. It is around 1.53 times as massive as the Sun and it shines at an effective temperature of 4,801 K.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.