Epsilon Telescopii

ε Telescopii

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Telescopium
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	4.50±0.01
Characteristics
Evolutionary stage	red giant branch
Spectral type	K0 III
U−B Template:Engvar	+0.78
B−V Template:Engvar	+1.01
Astrometry
Radial velocity (Rv)	−26.3±0.8 km/s
Proper motion (μ)	RA: −18.837 mas/yr Dec.: −38.102 mas/yr
Parallax (π)	8.0405±0.321 mas
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)	−1.00
Details
Mass	3.9 Template:Solar mass
Radius	20 Template:Solar radius
Luminosity	256 Template:Solar luminosity
Surface gravity (log g)	cgs
Temperature	K
Metallicity [Fe/H]	dex
Rotational velocity (v sin i)	6.1 km/s
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBAD	data

Epsilon Telescopii, Latinized from ε Telescopii, is a solitary, orange-hued star in the southern constellation of Telescopium. It is visible to the naked eye with an apparent visual magnitude of +4.53. Based upon an annual parallax shift of 7.80 mas as seen from Earth, 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. It displays an infrared excess, suggesting the presence of an orbiting disk of dust. The star is radiating 293 times the Sun's luminosity from its photosphere at an effective temperature of 4,996 K. It has a 13th magnitude optical companion at an angular separation of 16.30 arcseconds along a position angle of 233°, as of 2000.