Kappa2 Ceti

Kappa² Ceti (κ² Ceti), is a solitary,^[7] yellow-hued star located in the equatorial constellation of Cetus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.66.^[2] Based upon an annual parallax shift of 10.11 mas as seen from Earth,^[1] it is located about 320 light years from the Sun.

For other stars with this Bayer designation, see κ Ceti.

κ² Ceti

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Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Cetus
Right ascension	03h 21m 06.80281s[1]
Declination	+03° 40′ 32.2344″[1]
Apparent magnitude (V)	5.66[2]
Characteristics
Evolutionary stage	red clump[3]
Spectral type	G8 III[4]
U−B color index	+0.73[2]
B−V color index	+0.97[2]
Astrometry
Radial velocity (Rv)	+7.44±0.10[5] km/s
Proper motion (μ)	RA: +55.04[1] mas/yr Dec.: −25.12[1] mas/yr
Parallax (π)	10.11±0.33 mas[1]
Distance	320 ± 10 ly (99 ± 3 pc)
Absolute magnitude (MV)	0.630[3]
Details[5]
Mass	2.46±0.09 M☉
Radius	8.23±0.57 R☉
Luminosity	41.7 L☉
Surface gravity (log g)	2.98±0.04 cgs
Temperature	5,007±22 K
Metallicity [Fe/H]	+0.11±0.03 dex
Rotational velocity (v sin i)	0.98±0.45 km/s
Age	610±60 Myr
Other designations
κ2 Cet, 97 Cet, BD+03°461, HD 20791, HIP 15619, HR 1007, SAO 111142[6]
Database references
SIMBAD	data

Nomenclature

Bayer also applied the designation g Tauri to the same star as κ Ceti, but this is no longer used.^[8]

Characteristics

This is an evolved G-type giant star with a stellar classification of G8 III.^[4] It is a red clump star on the horizontal branch, which indicates it is generating energy through helium fusion at its core.^[3] The star has 2.46 times the mass of the Sun and has expanded to 8.2 times the Sun's radius. It is radiating 42 times the solar luminosity from its photosphere at an effective temperature of 5,007 K.^[5]