HD 206610

HD 206610 / Bosona

SDSS image of HD 206610
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius[1]
Right ascension 21h 43m 24.900s[2]
Declination −07° 24′ 29.71″[2]
Apparent magnitude (V) 8.34[1]
Characteristics
Evolutionary stage subgiant[3]
Spectral type K0III[4]
B−V color index 1.009±0.019[1]
Astrometry
Radial velocity (Rv)−18.62±0.12[2] km/s
Proper motion (μ) RA: 2.184±0.027 mas/yr[2]
Dec.: 1.781±0.024 mas/yr[2]
Parallax (π)6.7637 ± 0.0270 mas[2]
Distance482 ± 2 ly
(147.8 ± 0.6 pc)
Absolute magnitude (MV)1.99[1]
Details
Mass1.51±0.05[5] M☉
Radius6.0±0.2[5] R☉
Luminosity18±1[5] L☉
Surface gravity (log g)3.22±0.02[6] cgs
Temperature4,819±9[6] K
Metallicity [Fe/H]0.09±0.05[6] dex
Rotational velocity (v sin i)1.77±0.40[6] km/s
Age3.0±0.3[5] years
Other designations
BD−08°5719, Gaia DR2 2667434008056899712, HD 206610, HIP 107251, SAO 145619, TIC 333314269, TYC 5221-00210-1, 2MASS J21432490-0724296, WISE J214324.89-072429.7[7]
Database references
SIMBADdata

HD 206610, also known as Bosona, is a star with an orbiting exoplanet in the constellation of Aquarius. Based on parallax measurements, it is located at a distance of approximately 482 light years from the Sun.[2] The absolute magnitude of this star is 1.99,[1] but at that distance it is too faint to view with the naked eye, having an apparent visual magnitude of 8.34.[1] The system is drifting closer with a radial velocity of −18.6 km/s.[2]

This is an aging K-type subgiant star[3] with a stellar classification of K0III.[4] Having exhausted the supply of hydrogen at its core, the star is cooling and expanding along the red giant branch. At the age of about three billion years, it has 1.5 times the Sun's mass and has grown to six times the radius of the Sun.[5] It has a similar iron abundance to the Sun and is spinning with a projected rotational velocity of 1.77 km/s.[6] The star is radiating 18[5] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,819 K.[6]

The star HD 206610 and its exoplanet HD 206610 b are named Bosona and Naron respectively. The names were selected in the NameExoWorlds campaigns by Bosnia and Herzegovina during the 100th anniversary of the IAU. Bosona is the historic name for Bosnia, Horion Bosona, described in De Administrando Imperio by Porphyrogenitus in 10th century, and its namesake the river Bosna's ancient name Bosona (Bosina, Basina, Basante). Naron is one of the names given to the Neretva river in Herzegovina originating with the Romans (Naro, Narona, Narenta, Nerenta), while in local tradition the name is said to go back even earlier with the Celts who called it Nera Etwa, which means the Flowing Divinity.[8][9][10]

Planetary system

HD 206610 has one known exoplanet, HD 206610 b named Naron, discovered in 2010 using the radial velocity method.[3]

The HD 206610 planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b / Naron ≥2.036±0.065 MJ 1.74±0.33 673.2±3.3 0.100±0.042 — —

References

  1. ^ a b c d e f 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. S2CID 119257644.
  2. ^ a b c d e f g 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. ^ a b c Johnson, John Asher; et al. (2010). "Retired A Stars and Their Companions. IV. Seven Jovian Exoplanets from Keck Observatory". Publications of the Astronomical Society of the Pacific. 122 (892): 701–711. arXiv:1003.3445. Bibcode:2010PASP..122..701J. doi:10.1086/653809.
  4. ^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
  5. ^ a b c d e f Bonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: 14. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID 53971692. A5.
  6. ^ a b c d e f Jofré, E.; et al. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy & Astrophysics. 574: A50. arXiv:1410.6422. Bibcode:2015A&A...574A..50J. doi:10.1051/0004-6361/201424474. S2CID 53666931.
  7. ^ "HD 206610". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2024-01-03.
  8. ^ "IAU 100 #NameExoWorlds: Bosna i Hercegovina imenovala zvijezdu i egzoplanetu u sazviježđu Vodolije". Astronomsko društvo Orion (in Serbo-Croatian). Sarajevo. 17 December 2019. Retrieved 26 February 2023.
  9. ^ "International Astronomical Union". www.iau.org. Retrieved 2020-01-02.
  10. ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
  11. ^ Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0. S2CID 102486961.