Phi2 Ceti

For other stars with this Bayer designation, see φ Ceti.
φ2 Ceti
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 00h 50m 07.58859s[1]
Declination −10° 38′ 39.5848″[1]
Apparent magnitude (V) 5.172[2]
Characteristics
Spectral type F7V[3]
U−B color index +0.009[2]
B−V color index +0.518[2]
Astrometry
Radial velocity (Rv)+8.23±0.17[1] km/s
Proper motion (μ) RA: –226.91[4] mas/yr
Dec.: –229.75[4] mas/yr
Parallax (π)62.9723 ± 0.1614 mas[1]
Distance51.8 ± 0.1 ly
(15.88 ± 0.04 pc)
Absolute magnitude (MV)4.23[5]
Details
Mass1.19[6] M☉
Radius1.17+0.03
−0.01[1] R☉
Luminosity1.852+0.006
−0.007[1] L☉
Surface gravity (log g)4.45[6] cgs
Temperature6,352[6] K
Metallicity [Fe/H]−0.03[6] dex
Rotational velocity (v sin i)4.3[7] km/s
Age1.9[6] Gyr
Other designations
φ2 Cet, 19 Cet, NSV 316, BD−11° 153, GJ 37, HD 4813, HIP 3909, HR 235, SAO 147470
Database references
SIMBADdata

Phi2 Ceti, Latinized from φ2 Ceti), is a star located in the equatorial constellation of Cetus. φ2 Ceti is also known as 19 Cet, and HD 4813. Based upon parallax measurements, it is located about 51 light years away. It has an apparent visual magnitude of +5.19, making it bright enough to be seen with the naked eye. The star is drifting further away with a radial velocity of +8 km/s.[1]

This is an ordinary F-type main sequence star with a stellar classification of F7V. The star is estimated to be 1.9[6] billion years old and is spinning with a projected rotational velocity of 4.3 km/s.[7] It has 1.2[6] times the mass and 1.17[1] times the radius of the Sun. The star is radiating 1.85[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,352 K.[6] It is a suspected variable star of unknown type, with a brightness that has been measured ranging from magnitude 5.15 down to 5.24.[8]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference sps1966 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Paunzen2014 was invoked but never defined (see the help page).
  6. ^ a b c d e f g h Cite error: The named reference Bensby 2014 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference aaa493_3_1099 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Samus_et_al_2017 was invoked but never defined (see the help page).