HD 93083

HD 93083 is an 8th magnitude star located approximately 91 light years[1] away in the southern constellation of Antlia. It is an orange dwarf (spectral class K2V), somewhat cooler and less luminous than our Sun.[2]

HD 93083
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension  10h 44m 20.914s[1]
Declination –33° 34′ 37.28″[1]
Apparent magnitude (V) 8.33[2]
Characteristics
Spectral type K2IV-V[2]
B−V color index 0.945
Astrometry
Radial velocity (Rv)41.7 ± 2[2] km/s
Proper motion (μ) RA: –93.85 ± 0.93[1] mas/yr
Dec.: –150.99 ± 0.70[1] mas/yr
Parallax (π)35.90 ± 0.89[1] mas
Distance91 ± 2 ly
(27.9 ± 0.7 pc)
Absolute magnitude (MV)6.03
Details
Mass0.7 ± 0.04 M☉
Radius1.03 R☉
Luminosity0.4 L☉
Temperature4995 K
Metallicity0.15 ± 0.06
Age6×109 years
Other designations
HIP 52521, CD-32° 7598, GJ 1137, PPM 288057, GSC 07190-02048, SAO 201693
Database references
SIMBADdata
ARICNSdata
Extrasolar Planets
Encyclopaedia		data

The star HD 93083 is named Macondo. The name was selected in the NameExoWorlds campaign by Colombia, during the 100th anniversary of the IAU. Macondo is the mythical village of the novel One Hundred Years of Solitude (Cien años de soledad).[3][4]

Planetary system

In 2005, the discovery of a planet orbiting the star was announced. This is another discovery using the radial velocity method with the HARPS spectrograph.[5]

The HD 93083 planetary system[5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.37 MJ 0.477 143.58 ± 0.60 0.14 ± 0.03 — —
gollark: Actually, that's still weird, it doesn't look like it converges on some value.
gollark: Oh, minus infinity.
gollark: ???
gollark: Ah.
gollark: =wolf gamma(2)

See also
  • List of extrasolar planets
  • HARPS spectrograph

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
  2. "SIMBAD query result: NLTT 25207 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-22.
  3. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  4. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  5. Lovis, C.; et al. (2005). "The HARPS search for southern extra-solar planets III. Three Saturn-mass planets around HD 93083, HD 101930 and HD 102117". Astronomy and Astrophysics. 437 (3): 1121–1126. arXiv:astro-ph/0503660. Bibcode:2005A&A...437.1121L. doi:10.1051/0004-6361:20052864.

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