Zeta Telescopii

Zeta Telescopii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 18h 28m 49.85937s[1]
Declination −49° 04′ 14.1180″[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)−29.75±0.19[1] km/s
Proper motion (μ) RA: +139.344 mas/yr[1]
Dec.: −229.844 mas/yr[1]
Parallax (π)26.6984 ± 0.1406 mas[1]
Distance122.2 ± 0.6 ly
(37.5 ± 0.2 pc)
Absolute magnitude (MV)1.27±0.03[5]
Details[5]
Mass1.41±0.07 M☉
Radius8.27±0.15 R☉
Luminosity33.30±0.85 L☉
Surface gravity (log g)2.84±0.077 cgs
Temperature4,824±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[6]
Database references
SIMBADdata

Zeta Telescopii (ζ Telescopii) is the second-brightest star in the southern constellation of Telescopium. It is a solitary,[7] 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 26.7 mas as seen from Earth,[1] it is located around 122 light years from the Sun.

This is a red clump[2] giant star of spectral type K1 III-IV.[3] 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,[8] giving it the orange hue typical of K-type stars.[9]

  1. ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b c Cite error: The named reference Liu2007 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference ottoni was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Alves2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference csiro was invoked but never defined (see the help page).