| 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−Vcolor index | 1.009±0.019[1] |
| Astrometry | |
| Radial velocity (Rv) | −18.62±0.12[2] km/s |
| Proper motion (μ) | RA: 2.184±0.027mas/yr[2] Dec.: 1.781±0.024mas/yr[2] |
| Parallax (π) | 6.7637±0.0270 mas[2] |
| Distance | 482 ± 2 ly (147.8 ± 0.6 pc) |
| Absolute magnitude (MV) | 1.99[1] |
| Details | |
| Mass | 1.51±0.05[5] M☉ |
| Radius | 6.0±0.2[5] R☉ |
| Luminosity | 18±1[5] L☉ |
| Surface gravity (log g) | 3.22±0.02[6] cgs |
| Temperature | 4,819±9[6] K |
| Metallicity[Fe/H] | 0.09±0.05[6] dex |
| Rotational velocity (v sin i) | 1.77±0.40[6] km/s |
| Age | 3.0±0.3[5] Gyr |
| 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 | |
| SIMBAD | data |
HD 206610, also known asBosona, is astar with an orbitingexoplanet in theconstellation ofAquarius. Based onparallax measurements, it is located at a distance of approximately 482 light years from theSun.[2] Theabsolute magnitude of this star is 1.99,[1] but at that distance it is too faint to view with the naked eye, having anapparent visual magnitude of 8.34.[1] The system is drifting closer with aradial velocity of −18.6 km/s.[2]
This is an agingK-typesubgiant star[3] with astellar classification of K0III.[4] Having exhausted the supply of hydrogen at itscore, the star is cooling and expanding along thered 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 aprojected rotational velocity of 1.77 km/s.[6] The star is radiating 18[5] times the luminosity of the Sun from its enlargedphotosphere at aneffective temperature of 4,819 K.[6]
The star HD 206610 and its exoplanet HD 206610 b are named Bosona andNaron respectively. The names were selected in theNameExoWorlds campaigns byBosnia and Herzegovina during the 100th anniversary of theIAU. Bosona is the historic name forBosnia,Horion Bosona, described inDe Administrando Imperio byPorphyrogenitus in 10th century, and its namesake the riverBosna's ancient name Bosona (Bosina, Basina, Basante). Naron is one of the names given to theNeretva river in Herzegovina originating with theRomans (Naro, Narona, Narenta, Nerenta), while in local tradition the name is said to go back even earlier with theCelts who called it Nera Etwa, which means the Flowing Divinity.[8][9][10]
HD 206610 has one known exoplanet,HD 206610 b named Naron, discovered in 2010 using theradial velocity method.[3]
| 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 | — | — |
