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HD 118203 — оранжевая звезда (спектральный … HD 118203 — оранжевая звезда (спектральный тип K0), расположенная на расстоянии в 289 световых лет от Земли в созвездии Большой Медведицы. Масса звезды на 23 % больше, чем масса Солнца. Её не видно невооружённым глазом, но она легко доступна при наблюдении через бинокль или телескоп. Вокруг звезды обращается планета.елескоп. Вокруг звезды обращается планета.
, Liesma eller HD 118203 är en ensam stjärna … Liesma eller HD 118203 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Stora björnen. Den har en skenbar magnitud av ca 8,05 och kräver åtminstone en handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 10,8 mas, beräknas den befinna sig på ett avstånd på ca 302 ljusår (ca 93 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 7 km/s.eliocentrisk radialhastighet på ca 7 km/s.
, HD 118203 ist ein 289 Lichtjahre von der E … HD 118203 ist ein 289 Lichtjahre von der Erde entfernter später Hauptreihenstern mit einer Rektaszension von 13h 34m 02s und einer Deklination von +53° 43' 42". Er besitzt eine scheinbare Helligkeit von 8,05 mag. Im Jahre 2005 entdeckte einen extrasolaren Planeten, der diesen Stern umkreist. Dieser trägt den Namen HD 118203 b.reist. Dieser trägt den Namen HD 118203 b.
, HD 118203は、おおぐま座の恒星で8等星。太陽系外惑星が発見されている。
, HD 118203 is a star located in the norther … HD 118203 is a star located in the northern circumpolar constellation of Ursa Major. It has the proper name Liesma, which means flame, and it is the name of a character from the Latvian poem (Staburags and Liesma). The name was selected in the NameExoWorlds campaign by Latvia, during the 100th anniversary of the IAU. The apparent visual magnitude of HD 118203 is 8.06, which means it is invisible to the naked eye but it can be seen using binoculars or a telescope. Based on parallax measurements, it is located at a distance of 302 light years from the Sun. The star is drifting closer with a radial velocity of −29 km/s. Based on its position and space velocity this is most likely (97% chance) an older thin disk star. An exoplanet has been detected in a close orbit around the star. The spectrum of this star matches a K-type dwarf with a class of K0. Its absolute magnitude of 3.32 is too high for a K-type main-sequence star, indicating that it has begun to evolve on the subdwarf stage. This is confirmed by the surface gravity, which is too low for a typical dwarf star of this class. It has a low level of chromospheric activity, which means a low level of radial velocity jitter for planet detection purposes. The star has 1.23 times the mass of the Sun and double the Sun's radius. It is around 5.4 billion years old and is spinning with a projected rotational velocity of 7.0 km/s. HD 118203 is radiating 3.8 times the luminosity of the Sun from its photosphere at an effective temperature of 5,741 K. In 2006, a hot Jupiter candidate was reported in an eccentric orbit around this star. It was discovered using the radial velocity method based on observation of high-metallicity stars begun in 2004. In 2020, it was found that this is a transiting planet, which allowed the mass and radius of the body to be determined. This exoplanet has more than double the mass of Jupiter and a 13% greater radius. The fact that the parent star is among the brighter known planet hosts (as of 2020) makes it an interesting object for further study.t an interesting object for further study.
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| rdfs:comment |
HD 118203は、おおぐま座の恒星で8等星。太陽系外惑星が発見されている。
, HD 118203 ist ein 289 Lichtjahre von der E … HD 118203 ist ein 289 Lichtjahre von der Erde entfernter später Hauptreihenstern mit einer Rektaszension von 13h 34m 02s und einer Deklination von +53° 43' 42". Er besitzt eine scheinbare Helligkeit von 8,05 mag. Im Jahre 2005 entdeckte einen extrasolaren Planeten, der diesen Stern umkreist. Dieser trägt den Namen HD 118203 b.reist. Dieser trägt den Namen HD 118203 b.
, Liesma eller HD 118203 är en ensam stjärna … Liesma eller HD 118203 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Stora björnen. Den har en skenbar magnitud av ca 8,05 och kräver åtminstone en handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 10,8 mas, beräknas den befinna sig på ett avstånd på ca 302 ljusår (ca 93 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 7 km/s.eliocentrisk radialhastighet på ca 7 km/s.
, HD 118203 is a star located in the norther … HD 118203 is a star located in the northern circumpolar constellation of Ursa Major. It has the proper name Liesma, which means flame, and it is the name of a character from the Latvian poem (Staburags and Liesma). The name was selected in the NameExoWorlds campaign by Latvia, during the 100th anniversary of the IAU., during the 100th anniversary of the IAU.
, HD 118203 — оранжевая звезда (спектральный … HD 118203 — оранжевая звезда (спектральный тип K0), расположенная на расстоянии в 289 световых лет от Земли в созвездии Большой Медведицы. Масса звезды на 23 % больше, чем масса Солнца. Её не видно невооружённым глазом, но она легко доступна при наблюдении через бинокль или телескоп. Вокруг звезды обращается планета.елескоп. Вокруг звезды обращается планета.
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HD 118203
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