Kappa Capricorni

Kappa Capricorni is a solitary^[10] star in the constellation Capricornus. Its name is a Bayer designation that is Latinized from κ Capricorni, and abbreviated Kappa Cap or κ Capricorni. This star is visible to the naked eye with an apparent visual magnitude of +4.73.^[2] Based upon an annual parallax shift of 11.09 mas as seen from the Earth,^[1] the star is located about 305 light-years (93 pc) from the Sun. It is drifting closer with a line of sight velocity of −3 km/s.^[5] The star is positioned sufficiently close to the ecliptic that it is occasionally subject to lunar occultation.^[11]

κ Capricorni

Location of κ Capricorni (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Capricornus
Right ascension	21h 42m 39.508s[1]
Declination	−18° 51′ 58.76″[1]
Apparent magnitude (V)	+4.73[2]
Characteristics
Evolutionary stage	red clump[3]
Spectral type	G8 III[4]
U−B color index	+0.51[2]
B−V color index	+0.88[2]
Astrometry
Radial velocity (Rv)	−2.87±0.18[5] km/s
Proper motion (μ)	RA: +146.354 mas/yr[1] Dec.: −8.343 mas/yr[1]
Parallax (π)	10.6991±0.1277 mas[1]
Distance	305 ± 4 ly (93 ± 1 pc)
Absolute magnitude (MV)	−0.023[6]
Details[7]
Mass	2.43±0.21 M☉
Radius	13.28±0.47 R☉
Luminosity	106.8±5.9 L☉
Surface gravity (log g)	2.59±0.06 cgs
Temperature	5,096±57 K
Metallicity [Fe/H]	−0.39±0.10 dex
Rotational velocity (v sin i)	0.0[5] km/s
Age	1.19[8] Gyr
Other designations
κ Cap, 43 Cap, BD−19°6152, HD 206453, HIP 107188, HR 8288, SAO 164593[9]
Database references
SIMBAD	data

This is a yellow-hued, evolved, G-type giant star with a stellar classification of G8 III.^[4] There is a 91% probability that it is currently on the horizontal branch, rather than the red giant branch.^[7] As such, it is a red clump^[3] giant with an estimated 2.43 times the mass of the Sun and has expanded to 13.28 times the radius of the Sun.^[7] The star is about 1.2^[8] billion years old and has a projected rotational velocity that is too small to be measured.^[5] It radiates 107 times the solar luminosity from its photosphere at an effective temperature of 5,096 K.^[7]