Phi4 Ceti

For other stars with this Bayer designation, see φ Ceti.
Phi4 Ceti
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cetus
Right ascension 00h 58m 43.86832s[1]
Declination −11° 22′ 47.9147″[1]
Apparent magnitude (V) 5.61[2]
Characteristics
Evolutionary stage Horizontal branch
Spectral type G8 III[3]
B−V color index +0.94[2]
Astrometry
Radial velocity (Rv)−19.24±0.07[4] km/s
Proper motion (μ) RA: −33.159[1] mas/yr
Dec.: −14.202[1] mas/yr
Parallax (π)9.7623 ± 0.1120 mas[1]
Distance334 ± 4 ly
(102 ± 1 pc)
Absolute magnitude (MV)0.696[5]
Details[4]
Mass1.76±0.18 M☉
Radius11.08+0.35
−0.26[1] R☉
Luminosity64.9±0.9[1] L☉
Surface gravity (log g)2.60±0.06 cgs
Temperature4,903±28 K
Metallicity [Fe/H]−0.17±0.03 dex
Rotational velocity (v sin i)0.83±0.48 km/s
Age1.52 Gyr
Other designations
φ4 Cet, 23 Cet, BD−12°173, HD 5722, HIP 4587, HR 279, SAO 147546[6]
Database references
SIMBADdata

Phi4 Ceti is a solitary,[7] orange-hued star in the equatorial constellation Cetus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.61.[2] Based upon an annual parallax shift of 9.76 mas as seen from Earth, it is located approximately 334 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.10 due to interstellar dust,[4] giving it an absolute magnitude of 0.70.[5] It is drifting closer with a radial velocity of −19 km/s.[4]

This is an evolved G-type giant star with a stellar classification of G8 III.[3] At the estimated age of 1.5 billion years,[4] is a red clump giant on the horizontal branch, which indicates it is generating energy through helium fusion at its core.[5] The star has about 1.76[4] times the mass of the Sun and has expanded to 11 times the Sun's radius.[1] It is radiating 60 times the solar luminosity from its photosphere at an effective temperature of 4,903 K.[4]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Corben1968 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1999 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference jofre2015 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Liu2007 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).