Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cetus |
Right ascension | 02h 11m 21.079s [1] |
Declination | +08° 34′ 11.31″ [1] |
Apparent magnitude (V) | 5.623±0.01 [1] |
Characteristics | |
Evolutionary stage | Subgiant [1] |
Spectral type | G0IV [1] |
Apparent magnitude (B) | 6.189 [1] |
Apparent magnitude (R) | 6.81 [1] |
Apparent magnitude (G) | 5.497 [1] |
Apparent magnitude (J) | 4.763 [1] |
Apparent magnitude (H) | 4.373 [1] |
Apparent magnitude (K) | 4.308 [1] |
B−V color index | 0.52 [2] |
Astrometry | |
Radial velocity (Rv) | -19.01±0.22 [3] km/s |
Proper motion (μ) |
RA: -141.042
mas/
yr
[3] Dec.: -113.463 mas/ yr [3] |
Parallax (π) | 23.7901 ± 0.066 mas [3] |
Distance | 136.97
ly (42.016 pc) [3] |
Absolute magnitude (MV) | 2.49 [4] |
Details [2] | |
Mass | 1.53±0.04 M☉ |
Radius | 2.56±0.56 R☉ |
Luminosity | 8.13 [a] L☉ |
Surface gravity (log g) | 3.81±0.09 cgs |
Temperature | 6066±42 K |
Metallicity [Fe/H] | 0.14±0.04 dex |
Rotation | 15 days [b] |
Rotational velocity (v sin i) | 8.96±1.52 km/s |
Age | 2.63 [c] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
64 Ceti is a star located located in the constellation Cetus. Based on its spectral type of G0IV, it is a G-type star that has left the main sequence and evolved into a subgiant. [1] It is located 42.02 parsecs (137.1 light-years) away, based on a parallax measured by Gaia DR3, and it is moving towards Earth at a velocity of 19 km/s. [3] The apparent magnitude of 64 Ceti is 5.62, [1] which makes it visible to the naked eye only in dark skies, far away from light pollution. [4]
64 Ceti is a G-type star that has left the main sequence and now evolved into a subgiant, based on its spectral type of G0IV. [1] It has about 1.53 times the Sun's mass and has expanded to 2.53 times the Sun's diameter. [2] It is emitting 8.13 times the solar luminosity from its photosphere at an effective temperature of 6,066 K. [2] The age of 64 Ceti is estimated at 2.63 billion years, about 58% of the Solar System's age, [d] and it rotates under its axis at a speed of 8.96 km/s, translating into a rotation period of 15 days. [b] [2] The B-V index of the star is 0.52, corresponding to a yellow-white hue of a late G/early F star. [2] [e]
It is located in the constellation Cetus, based on its celestial coordinates. Gaia DR3 measured a parallax of 23.8 milliarcseconds for this star, translating into a distance of 42.02 parsecs (137.1 light-years). [3] The apparent magnitude of 64 Ceti is 5.62, [1] which means that it is a faint star, visible to the naked eye only from locations with dark skies. [4] The absolute magnitude, i.e. its brightness if it was seen at a distance of 10 pc (32.6 ly), is 2.49. [4] The star is moving towards Earth at a velocity of 19 km/s. [3] It has a high proper motion across the sky [1] and belongs to the thin disk population, being located 31.03 parsecs (101.2 ly) above the galactic plane. [2]