About: HD 16754

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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.

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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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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
dbp:epoch
  • J2000 (en)
dbp:luminosity
  • 17.440000 (xsd:double)
dbp:mass
  • 1.950000 (xsd:double)
dbp:metalFe
  • −0.06 (en)
dbp:pError
  • 0.393000 (xsd:double)
dbp:parallax
  • 24.707600 (xsd:double)
dbp:propMoDec
  • −17.82 (en)
dbp:propMoRa
  • +88.20 (en)
dbp:radius
  • 1.930000 (xsd:double)
dbp:rotationalVelocity
  • or (en)
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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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