HD 93083

HD 93083 / Macondo
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 10h 44m 20.91513s[1]
Declination –33° 34′ 37.2862″[1]
Apparent magnitude (V) 8.30[2]
Characteristics
Evolutionary stage Main sequence[3]
Spectral type K2IV-V[4] or K3V[5][6]
B−V color index 0.945±0.001[2]
Astrometry
Radial velocity (Rv)43.65[2] km/s
Proper motion (μ) RA: −92.721[1] mas/yr
Dec.: −152.238[1] mas/yr
Parallax (π)35.0393 ± 0.0484 mas[1]
Distance93.1 ± 0.1 ly
(28.54 ± 0.04 pc)
Absolute magnitude (MV)6.08[2]
Details[7]
Mass0.806+0.044
−0.033 M☉[7]
0.837±0.027[8] M☉
Radius0.844±0.011 R☉
Luminosity0.41[6] L☉
Surface gravity (log g)4.367±0.652 cgs
Temperature5,030±25 K
Metallicity [Fe/H]0.13±0.165 dex
Rotational velocity (v sin i)2.219±0.531 km/s
Age6 Gyr[9]
5.485±4.612 Gyr[8]
7.71[5]
13.557+4.008
−4.622[7] Gyr
Other designations
CD−32°7598, GJ 1137, HD 93083, HIP 52521, SAO 201693, PPM 288057, GSC 07190-02048[10]
Database references
SIMBADdata
ARICNSdata

HD 93083 is an orange-hued star in the southern constellation of Antlia. It has the proper name Macondo, after the mythical village of the novel One Hundred Years of Solitude (Cien años de soledad). The name was selected by Colombia during the IAU's NameExoWorlds campaign.[11][12] The star has an apparent visual magnitude of 8.30,[2] which is too faint to be visible to the naked eye. It is located at a distance of 93 light years from the Sun based on parallax. HD 93083 is drifting further away with a radial velocity of +43.65 km/s, having come to within 43 light-years some 484,000 years ago.[2]

This is a K-type main-sequence star that has been assigned a stellar classification of K2IV-V[4] or K3V,[5][6] depending on the study. It is smaller and less massive than the Sun, with a higher metallicity, or abundance of elements heavier than helium.[7] The star is roughly six billion years old with a low projected rotational velocity of 2.2 km/s, and has an expected main sequence lifetime of 20.4 billion years.[3] It is a source of X-ray emission with a luminosity of 7.9×1026 erg s−1.[5] The star is radiating around 41%[6] of the luminosity of the Sun from its photosphere at an effective temperature of 5,030 K.[7]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Schwarz_et_al_2007 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gray_et_al_2003 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Sanz-Forcada_et_al_2010 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Lovis_et_al_2005 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Soto_Jenkins2018 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Delgado_Mena_et_al_2019 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Saffe_et_al_2005 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference nameexoworlds was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference iau1912 was invoked but never defined (see the help page).