HD 118203
HD 118203 is a K-type subgiant star located in the Ursa Major constellation about 302 light years away from Earth. It has higher metallicity by 25% and very similar stellar age of 4.6 billion years. It has mass 23% greater than the Sun. It is invisible to the naked eye but it can be seen using binoculars or a telescope.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 13h 34m 02.5394s[1] |
| Declination | +53° 43′ 42.6984″[1] |
| Apparent magnitude (V) | 8.05 |
| Characteristics | |
| Spectral type | K0IV |
| Astrometry | |
| Proper motion (μ) | RA: −85.877±0.052[1] mas/yr Dec.: −78.913±0.038[1] mas/yr |
| Parallax (π) | 10.8102 ± 0.0275[1] mas |
| Distance | 301.7 ± 0.8 ly (92.5 ± 0.2 pc) |
| Other designations | |
| Database references | |
| SIMBAD | The star |
| planet b | |
| Exoplanet Archive | data |
The star HD 118203 is named Liesma. The name was selected in the NameExoWorlds campaign by Latvia, during the 100th anniversary of the IAU. Liesma means flame, and it is the name of a character from the Latvian poem Staburags un Liesma.[3][4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.173+0.077 −0.080 MJ |
0.07082+0.00095 −0.0011 |
6.134980+0.000038 −0.000037 |
0.316 ± 0.021 | 88.75+0.86 −1.0° |
1.133+0.031 −0.030 RJ |
See also
- List of extrasolar planets
- List of stars in Ursa Major
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- "HD 118203". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-13.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- Pepper, Joshua; Kane, Stephen R.; Rodriguez, Joseph E.; Hinkel, Natalie R.; Eastman, Jason D.; Daylan, Tansu; Mocnik, Teo; Dalba, Paul A.; Fetherolf, Tara; Stassun, Keivan G.; Campante, Tiago L. (2019-11-12). "TESS Reveals HD 118203 b to be a Transiting Planet". arXiv:1911.05150 [astro-ph.EP].
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