Delta Coronae Australis

Delta Coronae Australis is a single^[7] star located in the southern constellation of Corona Australis. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.57.^[2] The star is located about 174 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +21 km/s.^[1]

Delta Coronae Australis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Corona Australis
Right ascension	19h 08m 20.96980s[1]
Declination	−40° 29′ 48.1155″[1]
Apparent magnitude (V)	4.57[2]
Characteristics
Evolutionary stage	horizontal branch[3]
Spectral type	K1III[4]
B−V color index	+1.070±0.052[2]
Astrometry
Radial velocity (Rv)	+21.24±0.19[1] km/s
Proper motion (μ)	RA: +47.344[1] mas/yr Dec.: −27.047[1] mas/yr
Parallax (π)	18.6963±0.3123 mas[1]
Distance	174 ± 3 ly (53.5 ± 0.9 pc)
Absolute magnitude (MV)	0.93[5]
Details[3]
Mass	1.50±0.01 M☉
Radius	11.25±0.11 R☉
Luminosity	53±1 L☉
Surface gravity (log g)	2.59±0.10 cgs
Temperature	4,645±14 K
Metallicity [Fe/H]	+0.01±0.10 dex
Age	2.80±0.13 Gyr
Other designations
δ CrA, CD−40°13061, HD 177873, HIP 94005, HR 7242, SAO 229513[6]
Database references
SIMBAD	data

This object is an evolved giant star with a stellar classification of K1III.^[4] After exhausting the supply of hydrogen at its core, the star expanded off the main sequence and now has 11^[1] times the radius of the Sun. It is a red clump giant,^[3][5] which indicates it is on the horizontal branch and is generating energy through core helium fusion. The star is 2.8^[3] billion years old with 1.5^[3] times the mass of the Sun. It is radiating 55^[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,654 K.^[1]