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]
| 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 |
| Distance | 91 ± 2 ly (27.9 ± 0.7 pc) |
| Absolute magnitude (MV) | 6.03 |
| Details | |
| Mass | 0.7 ± 0.04 M☉ |
| Radius | 1.03 R☉ |
| Luminosity | 0.4 L☉ |
| Temperature | 4995 K |
| Metallicity | 0.15 ± 0.06 |
| Age | 6×109 years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
| 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]
| 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 | — | — |
See also
- List of extrasolar planets
- HARPS spectrograph
References
- 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
- "SIMBAD query result: NLTT 25207 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-22.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- 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.
External links
- Image HD 93083
- "HD 93083". Exoplanets. Archived from the original on 2012-05-13. Retrieved 2009-05-22.
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