HD 20868

HD 20868 / Intan
Observation data
Epoch J2000      Equinox J2000
Constellation Fornax
Right ascension 03h 20m 42.69389s[1]
Declination −33° 43′ 48.3739″[1]
Apparent magnitude (V) 9.92[2]
Characteristics
Spectral type K3/4 III/V[3][dubious – discuss]
Apparent magnitude (B) 11.07[4]
Apparent magnitude (J) 8.138±0.032[5]
Apparent magnitude (H) 7.641±0.031[5]
Apparent magnitude (K) 7.543±0.015[5]
B−V color index 1.037±0.005[2]
Astrometry
Radial velocity (Rv)46.207±0.0011[1] km/s
Proper motion (μ) RA: 292.467±0.035[1] mas/yr
Dec.: 96.138±0.058[1] mas/yr
Parallax (π)20.9257 ± 0.0304 mas[1]
Distance155.9 ± 0.2 ly
(47.79 ± 0.07 pc)
Absolute magnitude (MV)6.61[2]
Details[6]
Mass0.76±0.02 M☉
Radius0.73±0.01 R☉
Luminosity0.255±0.002 L☉
Surface gravity (log g)4.59±0.02 cgs
Temperature4,811±14 K
Metallicity [Fe/H]0.04±0.1 dex
Age8.4±3.7 Gyr
Other designations
CD−34°1218, HD 20868, HIP 15578, PPM 278952, LTT 1589, 2MASS J03204266-3343484[7]
Database references
SIMBADdata
Exoplanet Archivedata

HD 20868 is a star in the southern constellation Fornax. With an apparent visual magnitude of 9.92,[2] it is much too dim to be visible to the naked eye. Parallax measurements give a distance estimate of 156 light years from the Sun. It is drifting further away with a radial velocity of +46.2 km/s,[1] having come to within about 124 ly around 312,000 years ago.[2]

This object is a K-type star with a stellar classification of K3/4 III/V.[3] It is around eight billion years old with 76% of the mass of the Sun and 73% of the Sun's radius. It is radiating 25.5% of the luminosity of the Sun from its photosphere at an effective temperature of 4,811 K. The metallicity of the star is near solar, meaning it has about the same abundance of iron as in the Sun.[6]

The star HD 20868 is named Intan. The name was selected in the NameExoWorlds campaign by Malaysia, during the 100th anniversary of the IAU. Intan means diamond in the Malay language.[8][9]

  1. ^ a b c d e f g Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson2012 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. ^ Cite error: The named reference tycho2 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference 2MASS was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
  9. ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.