Phi Gruis

Phi Gruis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Grus
Right ascension 23h 18m 09.88466s[1]
Declination −40° 49′ 27.7034″[1]
Apparent magnitude (V) 5.49[2]
Characteristics
Evolutionary stage main sequence
Spectral type F4 V[3]
U−B color index −0.05[2]
B−V color index +0.47[2]
Astrometry
Radial velocity (Rv)+15.15±0.29[1] km/s
Proper motion (μ) RA: +126.920[1] mas/yr
Dec.: −122.577[1] mas/yr
Parallax (π)29.3153 ± 0.1115 mas[1]
Distance111.3 ± 0.4 ly
(34.1 ± 0.1 pc)
Absolute magnitude (MV)2.82[4]
Details[5]
Mass1.45+0.02
−0.01 M☉
Radius1.87+0.07
−0.04[1] R☉
Luminosity5.84±0.03[1] L☉
Surface gravity (log g)4.06±0.02 cgs
Temperature6,606±63 K
Metallicity [Fe/H]0.00±0.05 dex
Rotational velocity (v sin i)19.9±1.0[4] km/s
Age2.12+0.22
−0.16 Gyr
Other designations
φ Gru, CD−41°15211, GJ 4330, HD 219693, HIP 115054, HR 8859, SAO 231539[6]
Database references
SIMBADdata

Phi Gruis, Latinised from φ Gruis, is a solitary,[7] yellow-white hued star in the southern constellation of Grus, near the eastern constellation border with Phoenix. It is faintly visible to the naked eye with an apparent visual magnitude of +5.49.[2] Based upon an annual parallax shift of 29.3 mas as seen from the Earth,[8] it lies at a distance of 111 light years from the Sun. The star is drifting further away with a radial velocity of +15 km/s.[1]

This object is an F-type main-sequence star with a stellar classification of F4 V,[3] where the luminosity class of 'V' indicates it is currently generating energy through hydrogen fusion at its core. It is 2.12[5] billion years old and is spinning with a projected rotational velocity of 20 km/s.[4] The star has 1.45[5] times the mass of the Sun and 1.87[1] times the Sun's radius. It is radiating 5.8[1] times as much luminosity as the Sun from its photosphere at an effective temperature of 6,606 km/s.[5]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Przybylski1965 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference gray2006 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference AmmlerVonEiff2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference AguileraGómez2018 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).
  8. ^ Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).