Phi Gruis

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]

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]
Distance	111.3 ± 0.4 ly (34.1 ± 0.1 pc)
Absolute magnitude (MV)	2.82[4]
Details[5]
Mass	1.45+0.02 −0.01 M☉
Radius	1.87+0.07 −0.04[1] R☉
Luminosity	5.84±0.03[1] L☉
Surface gravity (log g)	4.06±0.02 cgs
Temperature	6,606±63 K
Metallicity [Fe/H]	0.00±0.05 dex
Rotational velocity (v sin i)	19.9±1.0[4] km/s
Age	2.12+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
SIMBAD	data

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]