| http://dbpedia.org/ontology/abstract
|
HD 181720 is an 8th-magnitude G-type main … HD 181720 is an 8th-magnitude G-type main sequence star located approximately 190 light-years away in the constellation Sagittarius. This star is larger, hotter, brighter and less massive than the Sun. Also its metal content is three-tenths as much as the Sun. The star HD 181720 is named Sika. The name was selected in the NameExoWorlds campaign by Ghana, during the 100th anniversary of the IAU. Sika means gold in the Ewe language. IAU. Sika means gold in the Ewe language.
, HD 181720 é uma estrela na constelação de … HD 181720 é uma estrela na constelação de Sagittarius. Tem uma magnitude aparente visual de 7,86, sendo invisível a olho nu. Medições de paralaxe, do segundo lançamento do catálogo Gaia, indicam que está localizada a uma distância de aproximadamente 197 anos-luz (60 parsecs) da Terra. Esta é uma estrela de classe G da sequência principal com um tipo espectral de G1V, o que indica que é uma estrela similar ao Sol que gera energia pela fusão de hidrogênio no núcleo, porém um pouco mais quente com uma temperatura efetiva de 5 840 K. Com uma idade estimada de 12 bilhões de anos, HD 181720 é mais evoluída que o Sol, possuindo um raio 42% maior que o raio solar e uma luminosidade de 2,11 vezes a solar, apesar de ser menos massiva com 87% da massa solar. Sua metalicidade, a abundância de elementos mais pesados que o hélio, é inferior à solar, com uma concentração de ferro de apenas 30% da solar. HD 181720 foi incluída em um programa do espectrógrafo HARPS para descobrir planetas extrassolares ao redor de estrelas pobres em metais, que possuem uma taxa de ocorrência de planetas gigantes significativamente inferior à de estrelas ricas em metais. O instrumento coletou 28 dados de velocidade radial entre setembro de 2003 e setembro de 2009, indicando a presença de um planeta com uma massa mínima de 37% da massa de Júpiter orbitando a estrela a uma distância média de 1,78 UA. Sua órbita tem um período de 956 dias e uma excentricidade de 0,26. Os dados astrométricos da sonda Hipparcos indicam que a massa real desse objeto está entre 6,1 e 217,9 massas de Júpiter, então é possível que ele seja anã marrom ou uma estrela de baixa massa. anã marrom ou uma estrela de baixa massa.
, HD 181720は、いて座の恒星で8等星。太陽系外惑星が発見されている。
, Sika eller HD 181720 är en ensam stjärna b … Sika eller HD 181720 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Skytten. Den har en skenbar magnitud av ca 7,84 och kräver en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2på ca 16,6 mas, beräknas den befinna sig på ett avstånd på ca 197 ljusår (ca 60 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -45 km/s.iocentrisk radialhastighet på ca -45 km/s.
, HD 181720 — звезда в созвездии Стрельца на расстоянии около 190 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.
|
| http://dbpedia.org/ontology/wikiPageID
|
25158037
|
| http://dbpedia.org/ontology/wikiPageLength
|
6254
|
| http://dbpedia.org/ontology/wikiPageRevisionID
|
1121991922
|
| http://dbpedia.org/ontology/wikiPageWikiLink
|
http://dbpedia.org/resource/Category:Henry_Draper_Catalogue_objects +
, http://dbpedia.org/resource/2MASS +
, http://dbpedia.org/resource/Sagittarius_%28constellation%29 +
, http://dbpedia.org/resource/HD_5388 +
, http://dbpedia.org/resource/IAU +
, http://dbpedia.org/resource/Star +
, http://dbpedia.org/resource/NLTT +
, http://dbpedia.org/resource/Ewe_language +
, http://dbpedia.org/resource/Luyten_Two-Tenths_catalogue +
, http://dbpedia.org/resource/Durchmusterung +
, http://dbpedia.org/resource/Ghana +
, http://dbpedia.org/resource/Light-year +
, http://dbpedia.org/resource/Category:Planetary_systems_with_one_confirmed_planet +
, http://dbpedia.org/resource/Category:G-type_main-sequence_stars +
, http://dbpedia.org/resource/Smithsonian_Astrophysical_Observatory_catalogue +
, http://dbpedia.org/resource/Lists_of_exoplanets +
, http://dbpedia.org/resource/Gas_giant +
, http://dbpedia.org/resource/Gold +
, http://dbpedia.org/resource/PPM_star_catalog +
, http://dbpedia.org/resource/HD_190984 +
, http://dbpedia.org/resource/Category:Hipparcos_objects +
, http://dbpedia.org/resource/HD_22781 +
, http://dbpedia.org/resource/HD_111232 +
, http://dbpedia.org/resource/Hipparcos_catalogue +
, http://dbpedia.org/resource/Category:Durchmusterung_objects +
, http://dbpedia.org/resource/Apparent_magnitude +
, http://dbpedia.org/resource/Sun +
, http://dbpedia.org/resource/GCRV +
, http://dbpedia.org/resource/Henry_Draper_catalogue +
, http://dbpedia.org/resource/Day +
, http://dbpedia.org/resource/NameExoWorlds +
, http://dbpedia.org/resource/Metallicity +
, http://dbpedia.org/resource/Category:Sagittarius_%28constellation%29 +
, http://dbpedia.org/resource/HD_181720_b +
, http://dbpedia.org/resource/Constellation +
, http://dbpedia.org/resource/Main_sequence +
, http://dbpedia.org/resource/G-type_star +
, http://dbpedia.org/resource/Category:2MASS_objects +
|
| http://dbpedia.org/property/absmagV
|
4.1
|
| http://dbpedia.org/property/appmag
|
6.346
, 6.652
, 6.294
, 8.44
|
| http://dbpedia.org/property/appmag1Passband
|
B
|
| http://dbpedia.org/property/appmag2Passband
|
J
|
| http://dbpedia.org/property/appmag3Passband
|
H
|
| http://dbpedia.org/property/appmag4Passband
|
K
|
| http://dbpedia.org/property/appmagV
|
7.84
|
| http://dbpedia.org/property/class
|
G1V
|
| http://dbpedia.org/property/constell
|
http://dbpedia.org/resource/Sagittarius_%28constellation%29 +
|
| http://dbpedia.org/property/eccentricity
|
0.26
|
| http://dbpedia.org/property/epe
|
HD+181720
|
| http://dbpedia.org/property/epoch
|
J2000.0
|
| http://dbpedia.org/property/exoplanet
|
http://dbpedia.org/resource/HD_181720_b +
|
| http://dbpedia.org/property/gravity
|
4.24
|
| http://dbpedia.org/property/luminosity
|
1.94
|
| http://dbpedia.org/property/mass
|
0.92
, ≥0.37
|
| http://dbpedia.org/property/metal
|
-0.53
|
| http://dbpedia.org/property/nsted
|
HD+181720
|
| http://dbpedia.org/property/pError
|
0.0664
|
| http://dbpedia.org/property/parallax
|
16.5816
|
| http://dbpedia.org/property/period
|
956
|
| http://dbpedia.org/property/propMoDec
|
-415.038
|
| http://dbpedia.org/property/propMoRa
|
88.154
|
| http://dbpedia.org/property/radialV
|
-45.404
|
| http://dbpedia.org/property/radius
|
1.39
|
| http://dbpedia.org/property/rotation
|
4060800.0
|
| http://dbpedia.org/property/rotationalVelocity
|
1.5
|
| http://dbpedia.org/property/semimajor
|
1.78
|
| http://dbpedia.org/property/simbad
|
HD+181720
|
| http://dbpedia.org/property/temperature
|
5781
|
| http://dbpedia.org/property/vR
|
0.599
|
| http://dbpedia.org/property/wikiPageUsesTemplate
|
http://dbpedia.org/resource/Template:Reflist +
, http://dbpedia.org/resource/Template:Starbox_begin +
, http://dbpedia.org/resource/Template:Starbox_catalog +
, http://dbpedia.org/resource/Template:Starbox_detail +
, http://dbpedia.org/resource/Template:Starbox_observe +
, http://dbpedia.org/resource/Template:Starbox_astrometry +
, http://dbpedia.org/resource/Template:Starbox_reference +
, http://dbpedia.org/resource/Template:Starbox_end +
, http://dbpedia.org/resource/Template:Starbox_character +
, http://dbpedia.org/resource/Template:Short_description +
, http://dbpedia.org/resource/Template:Stars_of_Sagittarius +
, http://dbpedia.org/resource/Template:Orbitbox_end +
, http://dbpedia.org/resource/Template:OrbitboxPlanet_begin +
, http://dbpedia.org/resource/Template:Extrasolar-planet-stub +
, http://dbpedia.org/resource/Template:DEC +
, http://dbpedia.org/resource/Template:Main-star-stub +
, http://dbpedia.org/resource/Template:OrbitboxPlanet +
, http://dbpedia.org/resource/Template:RA +
, http://dbpedia.org/resource/Template:Sky +
|
| http://purl.org/dc/terms/subject
|
http://dbpedia.org/resource/Category:2MASS_objects +
, http://dbpedia.org/resource/Category:Henry_Draper_Catalogue_objects +
, http://dbpedia.org/resource/Category:Hipparcos_objects +
, http://dbpedia.org/resource/Category:Durchmusterung_objects +
, http://dbpedia.org/resource/Category:Planetary_systems_with_one_confirmed_planet +
, http://dbpedia.org/resource/Category:G-type_main-sequence_stars +
, http://dbpedia.org/resource/Category:Sagittarius_%28constellation%29 +
|
| http://purl.org/linguistics/gold/hypernym
|
http://dbpedia.org/resource/Star +
|
| http://www.w3.org/ns/prov#wasDerivedFrom
|
http://en.wikipedia.org/wiki/HD_181720?oldid=1121991922&ns=0 +
|
| http://xmlns.com/foaf/0.1/isPrimaryTopicOf
|
http://en.wikipedia.org/wiki/HD_181720 +
|
| http://xmlns.com/foaf/0.1/name
|
HD181720
|
| owl:sameAs |
http://dbpedia.org/resource/HD_181720 +
, http://pt.dbpedia.org/resource/HD_181720 +
, http://ru.dbpedia.org/resource/HD_181720 +
, http://rdf.freebase.com/ns/m.09gh48y +
, https://global.dbpedia.org/id/3kD9o +
, http://ja.dbpedia.org/resource/HD_181720 +
, http://yago-knowledge.org/resource/HD_181720 +
, http://www.wikidata.org/entity/Q4039886 +
, http://fa.dbpedia.org/resource/%D8%A7%DA%86%E2%80%8C%D8%AF%DB%8C_%DB%B1%DB%B8%DB%B1%DB%B7%DB%B2%DB%B0 +
, http://sv.dbpedia.org/resource/HD_181720 +
|
| rdf:type |
http://dbpedia.org/ontology/Star +
, http://dbpedia.org/class/yago/Object100002684 +
, http://dbpedia.org/class/yago/WikicatHipparcosObjects +
, http://dbpedia.org/class/yago/PhysicalEntity100001930 +
, http://schema.org/Place +
, http://dbpedia.org/ontology/Location +
, http://dbpedia.org/ontology/Place +
, http://dbpedia.org/class/yago/Whole100003553 +
, http://dbpedia.org/ontology/CelestialBody +
, http://dbpedia.org/class/yago/Star109444100 +
, http://dbpedia.org/class/yago/WikicatHenryDraperCatalogueObjects +
, http://dbpedia.org/class/yago/WikicatG-typeMain-sequenceStars +
, http://dbpedia.org/class/yago/WikicatDurchmusterungObjects +
, http://dbpedia.org/class/yago/NaturalObject100019128 +
, http://dbpedia.org/class/yago/CelestialBody109239740 +
|
| rdfs:comment |
HD 181720 é uma estrela na constelação de … HD 181720 é uma estrela na constelação de Sagittarius. Tem uma magnitude aparente visual de 7,86, sendo invisível a olho nu. Medições de paralaxe, do segundo lançamento do catálogo Gaia, indicam que está localizada a uma distância de aproximadamente 197 anos-luz (60 parsecs) da Terra.amente 197 anos-luz (60 parsecs) da Terra.
, HD 181720 — звезда в созвездии Стрельца на расстоянии около 190 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.
, Sika eller HD 181720 är en ensam stjärna b … Sika eller HD 181720 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Skytten. Den har en skenbar magnitud av ca 7,84 och kräver en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2på ca 16,6 mas, beräknas den befinna sig på ett avstånd på ca 197 ljusår (ca 60 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -45 km/s.iocentrisk radialhastighet på ca -45 km/s.
, HD 181720は、いて座の恒星で8等星。太陽系外惑星が発見されている。
, HD 181720 is an 8th-magnitude G-type main … HD 181720 is an 8th-magnitude G-type main sequence star located approximately 190 light-years away in the constellation Sagittarius. This star is larger, hotter, brighter and less massive than the Sun. Also its metal content is three-tenths as much as the Sun. The star HD 181720 is named Sika. The name was selected in the NameExoWorlds campaign by Ghana, during the 100th anniversary of the IAU. Sika means gold in the Ewe language. IAU. Sika means gold in the Ewe language.
|
| rdfs:label |
HD 181720
|
