1 Ceti

1 Ceti is a star in the constellation of Cetus. With an apparent magnitude of about 6.2,^[3] the star is barely visible to the naked eye (see Bortle scale). Parallax estimates put it at a distance of about 535 light-years (164 parsecs) away from the Earth. It is moving further from the Sun with a heliocentric radial velocity of 4 km/s.^[6]

1 Ceti

Observation data Epoch J2000      Equinox J2000
Constellation	Cetus[1]
Right ascension	23h 58m 21.22532s[2]
Declination	−15° 50′ 50.9421″[2]
Apparent magnitude (V)	+6.276[3]
Characteristics
Spectral type	K1III CNII[4]
U−B color index	+1.03[5]
B−V color index	+1.08[5]
Astrometry
Radial velocity (Rv)	4.3±2[6] km/s
Proper motion (μ)	RA: +82.668[2] mas/yr Dec.: −7.878[2] mas/yr
Parallax (π)	6.0976±0.0711 mas[2]
Distance	535 ± 6 ly (164 ± 2 pc)
Absolute magnitude (MV)	−0.10[1]
Details
Mass	2.4[7] M☉
Radius	13.9[8] R☉
Luminosity	83[8] L☉
Surface gravity (log g)	2.60[7] cgs
Temperature	4,906[7] K
Metallicity [Fe/H]	0.05[7] dex
Rotational velocity (v sin i)	3.1[9] km/s
Other designations
1 Cet, BD−16°6394, FK5 3925, GC 33242, HD 224481, HIP 118178, HR 9065, SAO 165972[10]
Database references
SIMBAD	data

This star has a spectral type of K1III,^[4] implying a K-type giant. These types of stars are generally reddish-colored stars with spectral types from K to M, with radii that are 10 to 100 times larger than the Sun.^[11] The "CNII" in its spectral type indicates strong cyanogen signature in its outer atmosphere.^[12][13] The star is radiating 144^[1] times the Sun's luminosity from its enlarged photosphere.