HD 5388

Star in the constellation Phoenix

HD 5388
Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Phoenix
Right ascension	00^h 55^m 11.88995^s^[1]
Declination	–47° 24′ 21.4763″^[1]
Apparent magnitude (V)	6.73^[2]
Characteristics
Evolutionary stage	main sequence
Spectral type	F6V^[2]
Apparent magnitude (B)	7.73^[3]
Apparent magnitude (J)	5.795^[4]
Apparent magnitude (H)	5.524^[4]
Apparent magnitude (K)	5.441^[4]
B−V color index	0.500^[2]
Astrometry

Radial velocity (R_v)	+39.40±0.16^[1] km/s
Proper motion (μ)	RA: −80.390^[1] mas/yr Dec.: −178.132^[1] mas/yr
Parallax (π)	18.8155 ± 0.0268 mas^[1]
Distance	173.3 ± 0.2 ly (53.15 ± 0.08 pc)
Absolute magnitude (M_V)	3.10^[2]

Details^[2]

Mass	1.21 `M`_☉
Radius	1.87+0.03 −0.04^[1] `R`_☉
Luminosity	4.770+0.012 −0.011^[1] `L`_☉
Surface gravity (log g)	4.28±0.06 cgs
Temperature	6,297±32 K
Metallicity [Fe/H]	−0.27±0.02 dex
Rotation	23 days
Rotational velocity (v sin i)	4.2 km/s
Age	5.5±0.5^[5] Gyr

Other designations
78 G. Phoenicis, CD–48°216, HD 5388, HIP 4311, SAO 215291, PPM 305379, LTT 4311, NLTT 3057^[6]
Database references
SIMBAD	data
Exoplanet Archive	data

HD 5388 is a single^[7] star in the southern constellation of Phoenix. It has the Gould designation 78 G. Phoenicis,^[8] while HD 5388 is the star's Henry Draper Catalogue identifier. This object has a yellow-white hue and is too faint to be readily visible to average human eyesight, having an apparent visual magnitude of 6.73.^[2] It is located at a separation of 173 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +39 km/s.^[1]

This object is an ordinary F-type main-sequence star with a stellar classification of F6V,^[2] indicating that it is generating energy through core hydrogen fusion. It is not chromospherically active and its metal content is half as much as the Sun. The star is larger and more massive than the Sun,^[2] and radiates 4.8^[1] times the Sun's luminosity from its photosphere at an effective temperature of 6297 K.^[1]

In 2009, a substellar object (HD 5388 b) thought to be a gas giant planet was detected in orbit around the star using the HARPS instrument at La Silla Observatory.^[2] This was later demonstrated to be a brown dwarf rather than a planet. It has an elliptical orbit with a period of 2.13 years.^[9]

The HD 5388 planetary system^[2]^[9]^[10]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	87.02+13.99 −10.80 M_J	1.76	777±4	0.40±0.02	1.356+0.195 −0.191°	—

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Santos, Nuno C.; Mayor, Michel; Benz, Willy; Bouchy, François; et al. (2010). "The HARPS Search for Southern Extra-solar Planets XXI. Three New Giant Planets Orbiting the Metal-poor Stars HD 5388, HD 181720, and HD 190984". Astronomy and Astrophysics. 512 (A47): A47. arXiv:0912.3216. Bibcode:2010A&A...512A..47S. doi:10.1051/0004-6361/200913489. S2CID 118675798.
^ Høg, E.; et al. (2000). The Tycho-2 catalogue of the 2.5 million brightest stars. Vol. 355. Astronomy and Astrophysics. pp. L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. ISBN 978-0333750889.
^ ^a ^b ^c Cutri, R. M.; et al. (June 2003). 2MASS All Sky Catalog of point sources. NASA/IPAC. Bibcode:2003tmc..book.....C.
^ Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839.
^ "HD 5388". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-06.
^ Tokovinin, Andrei (2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal. 147 (4): 87. arXiv:1401.6827. Bibcode:2014AJ....147...87T. doi:10.1088/0004-6256/147/4/87. S2CID 56066740.
^ Gould, Benjamin Apthorp. "Uranometria Argentina". Archived from the original on 2012-02-27. Retrieved 2019-11-06.
^ ^a ^b Sahlmann, J.; et al. (2011). "HD 5388 b is a 69 MJup companion instead of a planet". Astronomy and Astrophysics Letters. 528. L8. arXiv:1102.3372. Bibcode:2011A&A...528L...8S. doi:10.1051/0004-6361/201116533. S2CID 55566004.
^ Kiefer, F.; et al. (January 2021). "Determining the true mass of radial-velocity exoplanets with Gaia. Nine planet candidates in the brown dwarf or stellar regime and 27 confirmed planets". Astronomy & Astrophysics. 645 A7. arXiv:2009.14164. Bibcode:2021A&A...645A...7K. doi:10.1051/0004-6361/202039168. S2CID 221995447.

Constellation of Phoenix

Stars

Bayer	α (Ankaa) β γ δ ε ζ (Wurren) η θ ι κ λ¹ λ² μ ν ξ π ρ σ τ υ φ χ ψ ω
Variable	RV SX YZ AD AE AI AW AZ BB BD
HR	6 23 73 109 111 120 140 148 162 171 198 202 209 229 299 350 408 411 443 447 519 524 537 574 588 632 636 659 686 698 706 8910 8920 8929 8959 8993 9001 9046 9077 9082
HD	2039 5388 6434 (Nenque) 8535 9895 11421 13218 13387 223549 224782
Other	CD-44 170 BPM 30551 HE 0107-5240 NGC 405 WASP-4 WASP-5 WASP-18 WASP-29 WASP-96 WD 2359-434