Phi3 Ceti

Phi³ Ceti is a solitary,^[8] orange-hued star in the equatorial constellation of Cetus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.31.^[2] Based upon an annual parallax shift of 6.11 mas as seen from Earth,^[1] it is located approximately 530 light years from the Sun, give or take 20 light years. The star is drifting closer with a radial velocity of −25.5 km/s.^[1]

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

Phi³ Ceti

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Cetus
Right ascension	00h 56m 01.48867s[1]
Declination	−11° 15′ 59.4988″[1]
Apparent magnitude (V)	5.31[2]
Characteristics
Spectral type	K5 III[3]
B−V color index	+1.52[2]
Astrometry
Radial velocity (Rv)	−25.48±0.38[1] km/s
Proper motion (μ)	RA: −26.909[1] mas/yr Dec.: −7.174[1] mas/yr
Parallax (π)	6.1068±0.2570 mas[1]
Distance	530 ± 20 ly (164 ± 7 pc)
Absolute magnitude (MV)	−0.78[4]
Details
Mass	1.4[5] M☉
Radius	44.33+0.76 −2.94[1] R☉
Luminosity	441±21[1] L☉
Surface gravity (log g)	1.67[6] cgs
Temperature	3,974+139 −34[1] K
Metallicity [Fe/H]	−0.31[6] dex
Rotational velocity (v sin i)	1.0[5] km/s
Other designations
φ3 Ceti, 22 Cet, BD−12°162, HD 5437, HIP 4371, HR 267, SAO 147519[7]
Database references
SIMBAD	data

This is an evolved K-type giant star with a stellar classification of K5 III.^[3] It has about 1.4^[5] times the mass and 44^[1] times the radius of the Sun. The star radiates 441 times the solar luminosity from its photosphere at an effective temperature of 3,974 K.^[1]