About: 1 Delphini

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1 Delphini (1 Del) is the Flamsteed designation for a close binary star in the equatorial constellation Delphinus. With a combined apparent magnitude of 6.08, it is barely visible to the naked eye, even under ideal conditions. Parallax measurements put the components at a distance 703 and 780 light years respectively. However, its approaching the Solar System with a radial velocity of 15 km/s. Due to the stability of the emission lines data from 1 Delphini has been used for developing models of shell stars and Be stars.

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  • 1 Delphini (1 Del) is the Flamsteed designation for a close binary star in the equatorial constellation Delphinus. With a combined apparent magnitude of 6.08, it is barely visible to the naked eye, even under ideal conditions. Parallax measurements put the components at a distance 703 and 780 light years respectively. However, its approaching the Solar System with a radial velocity of 15 km/s. 1 Del consists of three components. The brightest of them has a magnitude of 6.1; a companion located around 0.9 arcseconds from the primary has an apparent magnitude of 8.1; and a third star, located much farther away at around 17 arcseconds from component A, is the faintest with a magnitude of around 14 and is an unrelated background object. The entire system has a stellar classification of A1: III sh, indicating that it is a white giant + a shell star. However, there is some uncertainty about the temperature class. When resolved, the secondary has a class of B9. 1 Del A has 3 times the mass of the Sun and an effective temperature of 10,651 K, giving it a bluish white glow. It is estimated to be almost 250 million years old and has a solar metallicity. Both components spin rapidly, with projected rotational velocities of 217 and 370 km/s respectively. As for the peculiarities, the shell star is a primary component; the spectrum of the secondary shows broad absorption lines. Due to the stability of the emission lines data from 1 Delphini has been used for developing models of shell stars and Be stars. (en)
  • 1 Delphini, som är stjärnans Flamsteed-beteckning, är en trippelstjärna belägen i den mellersta delen av stjärnbilden Delfinen. Den har en lägsta skenbar magnitud på ca 6,08 och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 4,4 mas, beräknas den befinna sig på ett avstånd av ca 700 ljusår (ca 230 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -16 km/s. (sv)
  • 海豚座1，又名BD+10 4303，HD 195325、SAO 106172、HR 7836，是海豚座的一颗恒星，视星等为6.08，位于銀經54.66，銀緯-16.21，其B1900.0坐标为赤經20h 25m 30.6s，赤緯+10° -16.21′ 39″。 (zh)
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  • −0.69 (en)
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  • −0.03 (en)
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  • A1:III shell (en)
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  • A (en)
  • B (en)
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  • J2000 (en)
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  • 3.660000 (xsd:double)
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  • 0 (xsd:integer)
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  • y (en)
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  • 4.185100 (xsd:double)
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  • +4.645 (en)
  • +4.710 (en)
dbp:propMoRa
  • +19.320 (en)
  • +19.545 (en)
dbp:radialV
  • −15.5 ± 2 (en)
dbp:rotationalVelocity
  • 217 (xsd:integer)
  • 370 (xsd:integer)
dbp:temperature
  • 10651 (xsd:integer)
dbp:uB
  • −0.11 (en)
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  • 1 Delphini, som är stjärnans Flamsteed-beteckning, är en trippelstjärna belägen i den mellersta delen av stjärnbilden Delfinen. Den har en lägsta skenbar magnitud på ca 6,08 och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 4,4 mas, beräknas den befinna sig på ett avstånd av ca 700 ljusår (ca 230 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -16 km/s. (sv)
  • 海豚座1，又名BD+10 4303，HD 195325、SAO 106172、HR 7836，是海豚座的一颗恒星，视星等为6.08，位于銀經54.66，銀緯-16.21，其B1900.0坐标为赤經20h 25m 30.6s，赤緯+10° -16.21′ 39″。 (zh)
  • 1 Delphini (1 Del) is the Flamsteed designation for a close binary star in the equatorial constellation Delphinus. With a combined apparent magnitude of 6.08, it is barely visible to the naked eye, even under ideal conditions. Parallax measurements put the components at a distance 703 and 780 light years respectively. However, its approaching the Solar System with a radial velocity of 15 km/s. Due to the stability of the emission lines data from 1 Delphini has been used for developing models of shell stars and Be stars. (en)
rdfs:label
  • 1 Delphini (en)
  • 1 Delphini (sv)
  • 敗瓜增一 (zh)
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