| dbo:abstract |
HD 16754 is a binary or triple-star system in the constellation Eridanus. It has the Bayer designation s Eridani; HD 16754 is the designation from the Henry Draper catalogue. The system is visible to the naked eye as a faint point of light with an apparent visual magnitude of +4.74. It is located at a distance of approximately 132 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s. The system is a member of the Columba association of co-moving stars. This object was flagged as an astrometric binary based on proper motion measurements made from the Hipparcos spacecraft. Zuckerman et al. (2011) consider it a multi-star system, with a bright A-type primary plus a faint M-type companion at an angular separation of 25″ to the north. The astrometric companion to the primary remains unresolved. The main component is an A-type main-sequence star with a stellar classification of A1 Vb. Based upon stellar models, it has an age estimated at 212 million years. Consistency with its membership in the Columba association suggests a much younger age of 30 million years. Earlier measurements showed a high projected rotational velocity of 168 km/s. However, Ammler-von Eiff and Reiners (2012) found a much lower velocity of 13 km/s. The visible companion is a red dwarf star with a class in the range M2-5V. The system is a source of X-ray emission with a luminosity of 924×1020 W, which is most likely coming from this component and the unresolved companion. (en) HD 16754 (s Eridanus) é uma estrela na direção da Eridanus. Possui uma ascensão reta de 02h 39m 47.92s e uma declinação de −42° 53′ 29.9″. Sua magnitude aparente é igual a 4.74. Considerando sua distância de 130 anos-luz em relação à Terra, sua magnitude absoluta é igual a 1.74. Pertence à classe espectral A2V. (pt) HD 16754 är en dubbel - eller trippelstjärna i den mellersta delen av stjärnbilden Eridanus som också har Bayer-beteckningen s Eridani. Den har en kombinerad genomsnittlig skenbar magnitud av ca 4,74 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 24,7 mas, beräknas den befinna sig på ett avstånd på ca 132 ljusår (ca 41 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 18 km/s. Den ingår i Columba-föreningen av stjärnor med gemensam egenrörelse. (sv) HD 16754，又名CD-43 814，SAO 215996、HR 789，是一颗恒星，视星等为4.75，位于銀經255.67，銀緯-62.98，其B1900.0坐标为赤經2h 35m 59.2s，赤緯-43° -62.98′ 15″。 (zh) |
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dbr:Bayer_designation dbr:Binary_star dbr:Stellar_classification dbc:A-type_main-sequence_stars dbc:Astrometric_binaries dbc:Bayer_objects dbc:Bright_Star_Catalogue_objects dbc:Durchmusterung_objects dbc:Eridanus_(constellation) dbc:Henry_Draper_Catalogue_objects dbc:Hipparcos_objects dbc:M-type_main-sequence_stars dbc:Triple_star_systems dbr:Constellation dbr:Light_year dbr:Columba_association dbr:Stellar_parallax dbr:A-type_main-sequence_star dbr:Eridanus_(constellation) dbr:Henry_Draper_catalogue dbr:Hipparcos dbr:Astrometric_binary dbr:Angular_separation dbr:Sun dbr:Red_dwarf dbr:Apparent_visual_magnitude dbr:Radial_velocity dbr:X-ray_astronomy dbr:A-type_star dbr:Projected_rotational_velocity |
| dbp:absmagV |
+1.76 (en) |
| dbp:ageMyr |
212 (xsd:integer) |
| dbp:appmagV |
+4.74 (en) |
| dbp:class |
A1 Vb + M2-5V + ? (en) |
| dbp:component |
Aa (en) |
| dbp:constell |
dbr:Eridanus_(constellation) |
| dbp:epoch |
J2000 (en) |
| dbp:luminosity |
17.440000 (xsd:double) |
| dbp:mass |
1.950000 (xsd:double) |
| dbp:metalFe |
−0.06 (en) |
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0.393000 (xsd:double) |
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24.707600 (xsd:double) |
| dbp:propMoDec |
−17.82 (en) |
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+88.20 (en) |
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1.930000 (xsd:double) |
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or (en) |
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dbr:Star |
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owl:Thing dbo:Place dbo:Location schema:Place dbo:CelestialBody yago:CelestialBody109239740 yago:NaturalObject100019128 yago:Object100002684 yago:PhysicalEntity100001930 yago:WikicatHenryDraperCatalogueObjects dbo:Star yago:Star109444100 yago:Whole100003553 yago:WikicatA-typeMain-sequenceStars |
| rdfs:comment |
HD 16754 (s Eridanus) é uma estrela na direção da Eridanus. Possui uma ascensão reta de 02h 39m 47.92s e uma declinação de −42° 53′ 29.9″. Sua magnitude aparente é igual a 4.74. Considerando sua distância de 130 anos-luz em relação à Terra, sua magnitude absoluta é igual a 1.74. Pertence à classe espectral A2V. (pt) HD 16754 är en dubbel - eller trippelstjärna i den mellersta delen av stjärnbilden Eridanus som också har Bayer-beteckningen s Eridani. Den har en kombinerad genomsnittlig skenbar magnitud av ca 4,74 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 24,7 mas, beräknas den befinna sig på ett avstånd på ca 132 ljusår (ca 41 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 18 km/s. Den ingår i Columba-föreningen av stjärnor med gemensam egenrörelse. (sv) HD 16754，又名CD-43 814，SAO 215996、HR 789，是一颗恒星，视星等为4.75，位于銀經255.67，銀緯-62.98，其B1900.0坐标为赤經2h 35m 59.2s，赤緯-43° -62.98′ 15″。 (zh) HD 16754 is a binary or triple-star system in the constellation Eridanus. It has the Bayer designation s Eridani; HD 16754 is the designation from the Henry Draper catalogue. The system is visible to the naked eye as a faint point of light with an apparent visual magnitude of +4.74. It is located at a distance of approximately 132 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s. The system is a member of the Columba association of co-moving stars. (en) |
| rdfs:label |
HD 16754 (en) HD 16754 (pt) HD 16754 (sv) HD 16754 (zh) |
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freebase:HD 16754 wikidata:HD 16754 dbpedia-pt:HD 16754 dbpedia-sv:HD 16754 dbpedia-tr:HD 16754 dbpedia-zh:HD 16754 https://global.dbpedia.org/id/4iMQB yago-res:HD 16754 |
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wikipedia-en:HD_16754?oldid=1094388223&ns=0 |
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wikipedia-en:HD_16754 |
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dbr:HIP_12413 |
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