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.

HD 118203
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
Distance301.7 ± 0.8 ly
(92.5 ± 0.2 pc)
Other designations
BD+54°1609, HIP 66192, SAO 28802[2], TOI 1271
Database references
SIMBADThe star
planet b
Exoplanet Archivedata

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]

The HD 118203 planetary system[5]
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

References
  1. 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.
  2. "HD 118203". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-13.
  3. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  4. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  5. 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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