HD 5388

Last updated
HD 5388
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Phoenix [1]
Right ascension 00h 55m 11.88996s [2]
Declination −47° 24′ 21.4772″ [2]
Apparent magnitude  (V)6.73 [3]
Characteristics
Evolutionary stage main sequence [2]
Spectral type F6V [3]
Apparent magnitude  (B)7.73 [4]
Apparent magnitude  (J)5.795 [5]
Apparent magnitude  (H)5.524 [5]
Apparent magnitude  (K)5.441 [5]
B−V color index 0.500 [3]
Astrometry
Radial velocity (Rv)+39.46±0.12 [2] km/s
Proper motion (μ)RA: −80.390 mas/yr [2]
Dec.: −178.083 mas/yr [2]
Parallax (π)18.8432±0.0199  mas [2]
Distance 173.1 ± 0.2  ly
(53.07 ± 0.06  pc)
Absolute magnitude  (MV)3.10 [3]
Details [3]
Mass 1.21  M☉
Radius 1.87+0.03
−0.04 [6]   R☉
Luminosity 4.770+0.012
−0.011 [6]   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 [7]   Gyr
Other designations
78 G. Phoenicis, CD−48°216, HD 5388, HIP 4311, SAO 215291, PPM 305379, LTT 4311, NLTT 3057 [8]
Database references
SIMBAD data

HD 5388 is a single [9] star in the southern constellation of Phoenix. It has the Gould designation 78 G. Phoenicis, [10] 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. [3] It is located at a distance of 173  light-years from the Sun based on parallax, and is drifting further away with a radial velocity of +39 km/s. [2]

This object is an ordinary F-type main-sequence star with a stellar classification of F6V, [3] 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, [3] and radiates 4.8 [6] times the Sun's luminosity from its photosphere at an effective temperature of 6297 K. [6]

In 2009, a substellar object (HD 5388 b) was detected in orbit around the star using the HARPS instrument at La Silla Observatory. Its minimum mass is consistent with a gas giant planet, and it has an elliptical orbit with a period of 2.13 years. [3] Later astrometric observations suggested that this object is a massive brown dwarf in a nearly face-on orbit rather than a planet, [11] [12] but a more recent astrometric study in 2026 found a much smaller true mass, again consistent with a planet. [13]

The HD 5388 planetary system [13]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b3.2+0.3
−0.2  MJ 		1.757±0.001772.5±1.00.41±0.0238.7+10.2
−6.8 ° 		—

See also

References

  1. ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 5 6 7 8 9 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.
  4. ↑ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. ISBN   978-0333750889.
  5. 1 2 3 Cutri, R. M.; et al. (June 2003). 2MASS All Sky Catalog of point sources. NASA/IPAC. Bibcode:2003tmc..book.....C.
  6. 1 2 3 4 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.
  7. ↑ 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.
  8. ↑ "HD 5388". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-11-06.
  9. ↑ 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.
  10. ↑ Gould, Benjamin Apthorp. "Uranometria Argentina". Archived from the original on 2012-02-27. Retrieved 2019-11-06.
  11. ↑ 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.
  12. ↑ 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.
  13. 1 2 Piccinini, G.; Petralia, A.; et al. (January 2026). "True Masses using RV data with Hipparcos and Gaia Astrometry". Astronomy & Astrophysics . arXiv: 2601.09401 .
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.