Epsilon Telescopii

ε Telescopii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 18h 11m 13.7612s[1]
Declination −45° 57′ 15.8824″[1]
Apparent magnitude (V) 4.50±0.01[2]
Characteristics
Spectral type K0 III[3]
U−B color index +0.78[4]
B−V color index +1.01[4]
Astrometry
Radial velocity (Rv)−26.3±0.8[5] km/s
Proper motion (μ) RA: −18.837 mas/yr[1]
Dec.: −38.102 mas/yr[1]
Parallax (π)8.0405 ± 0.321 mas[1]
Distance410 ± 20 ly
(124 ± 5 pc)
Absolute magnitude (MV)−1.00[6]
Details
Luminosity293[7] L☉
Surface gravity (log g)2.32±0.12[8] cgs
Temperature4,996±42[8] K
Metallicity [Fe/H]−0.07±0.04[8] dex
Other designations
ε Tel, CD−45° 12251, FK5 1473, HD 166063, HIP 89112, HR 6783, SAO 228777[9]
Database references
SIMBADdata

Epsilon Telescopii, Latinized from ε Telescopii, is a solitary,[10] orange-hued star in the southern constellation of Telescopium. It is visible to the naked eye with an apparent visual magnitude of +4.53.[4] Based upon an annual parallax shift of 7.80 mas as seen from Earth,[1] it is located roughly 410 light years from the Sun, give or take 20 light years.

This an evolved K-type giant with a stellar classification of K0 III.[3] It displays an infrared excess, suggesting the presence of an orbiting disk of dust.[11] The star is radiating 293[7] times the Sun's luminosity from its photosphere at an effective temperature of 4,996 K.[8] It has a 13th magnitude optical companion at an angular separation of 16.30 arcseconds along a position angle of 233°, as of 2000.[12]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Alves2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Zuckerman1995 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).