HD 208487

HD 208487 / Itonda
Observation data
Epoch J2000      Equinox J2000
Constellation Grus[1]
Right ascension 21h 57m 19.84754s[2]
Declination −37° 45′ 49.0480″[2]
Apparent magnitude (V) 7.47[1]
Characteristics
Evolutionary stage main sequence
Spectral type G1/3V[3]
B−V color index 0.568±0.009[1]
Variable type Stable[4]
Astrometry
Radial velocity (Rv)5.575±0.0004[5] km/s
Proper motion (μ) RA: 101.032 mas/yr[2]
Dec.: −118.842 mas/yr[2]
Parallax (π)22.2688 ± 0.0304 mas[2]
Distance146.5 ± 0.2 ly
(44.91 ± 0.06 pc)
Absolute magnitude (MV)4.26[4]
Absolute bolometric
magnitude (Mbol)		4.06[4]
Details
Mass1.16±0.02[6] M☉
Radius1.17±0.03[6] R☉
Luminosity1.76±0.05[6] L☉
Surface gravity (log g)4.36±0.03[6] cgs
Temperature6,143±47[6] K
Metallicity [Fe/H]0.08[7] dex
Rotational velocity (v sin i)3.688[6] km/s
Age2.3±0.9 Gyr[6]
1.325±1.007[7] Gyr
Other designations
Itonda, CD−38° 14804, HD 208487, HIP 108375, SAO 213432, PPM 302029[8]
Database references
SIMBADdata

HD 208487 is a star with an orbiting exoplanet in the constellation of Grus. Based on parallax measurements, it is located at a distance of 146.5 light years from the Sun. The absolute magnitude of HD 208487 is 4.26,[4] but at that distance the apparent visual magnitude is 7.47,[1] which is too faint to be viewed with the naked eye. The system is drifting further away with a radial velocity of 5.6 km/s.[5] It is a member of the thin disk population.[7]

The spectrum of HD 208487 presents as an ordinary G-type main-sequence star with a stellar classification of G1/3V.[3] It is a relatively young star, with age estimates of 1–2 billion years, and is spinning with a projected rotational velocity of 3.7 km/s.[7][6] The star has 16% greater mass and a 17% larger radius than the Sun.[6] The abundance of iron, a measure of the star's metallicity, is similar to the Sun.[7] It is radiating 176% of the luminosity of the Sun from its photosphere at an effective temperature of 6,143 K.[6] The level of magnetic activity in the chromosphere is low.[4]

The star HD 208487 is named Itonda and the exoplanet Mintome. The names were selected in the NameExoWorlds campaign by Gabon, during the 100th anniversary of the IAU. Itonda, in the Myene tongue, corresponds to all that is beautiful. Mintome, in the Fang tongue, is a mythical land where a brotherhood of brave men live.[9][10]

  1. ^ a b c d Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Tinney2005 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  6. ^ a b c d e f g h i j Cite error: The named reference Bonfanti_et_al_2016 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Costa_Silva_et_al_2020 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference exoworlds was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference iau was invoked but never defined (see the help page).