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9 Puppis è una stella binaria di magnitudine 5,16 situata nella costellazione della Poppa. Dista 54 anni luce dal sistema solare.
, 9 Puppis is a binary star system in the so … 9 Puppis is a binary star system in the southern constellation of Puppis. It was originally designated 9 Argus, being part of the now defunct Argo Navis constellation. The system is faintly visible to the naked eye as a point of light with a combined apparent visual magnitude of 5.16. The magnitude difference between the two stars is 0.65. Parallax measurements yield a distance estimate to 9 Puppis of approximately 54 light years from the Sun, with the dynamic and trigonometric parallaxes for the system being in close agreement. It is drifting closer with a systemic radial velocity of –21 km/s. The motion of the system through space is predicted to bring it as close as 42.2 light-years in about 292,000 years. The binary nature of this system was discovered by S. W. Burnham in 1873, and it now has the discovery code BU 101 (originally: β 101). Early efforts at computing orbital elements were made by Burnham (1894), Aitken (1914), and others. The latest refined elements show an orbital period of 22.7 years with a large eccentricity (ovalness) of 0.74. The orbital plane is highly inclined to the line of sight at an angle of 80.4°. The physical size of the system's semimajor axis is estimated to be 10 AU. The large eccentricity of their orbit means a circumstellar planetary orbit would most likely only be stable over long periods with a semimajor axis inside 0.67 AU from the primary and 0.63 AU from the secondary. An outer circumbinary planet would have a stable orbit with a semimajor axis beyond about 34.5 AU from the barycenter. The stellar classification of the 9 Puppis system is G0V, matching a G-type main-sequence star like the Sun. The dynamic masses of the components are 1.06 and 0.90 times the mass of the Sun, yielding estimated individual stellar classes of G1 for the primary and G9 for the secondary, respectively. The system has been listed as a probable member of the Ursa Major Moving Group, but was excluded by Soderblom and Mayor (1993) due to low lithium abundance and low X-ray flux. Their age determined from chromospheric heating is around seven billion years.ric heating is around seven billion years.
, 船尾座9，又名BD-13 2267，HD 64096、SAO 153500、HR 3064，是船尾座的一颗恒星，视星等为5.17，位于銀經232.27，銀緯6.62，其B1900.0坐标为赤經7h 47m 8.4s，赤緯-13° 6.62′ 57″。
, 9 Puppis är en dubbelstjärna och eruptiv v … 9 Puppis är en dubbelstjärna och eruptiv variabel av RS Canum Venaticorum-typ (RS:) i Akterskeppets stjärnbild. Stjärnan varierar mellan visuell magnitud +5,14 och 5,17 utan någon fastställd periodicitet. Den befinner sig på ett avstånd av ungefär 54 ljusår.r sig på ett avstånd av ungefär 54 ljusår.
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9 Puppis är en dubbelstjärna och eruptiv v … 9 Puppis är en dubbelstjärna och eruptiv variabel av RS Canum Venaticorum-typ (RS:) i Akterskeppets stjärnbild. Stjärnan varierar mellan visuell magnitud +5,14 och 5,17 utan någon fastställd periodicitet. Den befinner sig på ett avstånd av ungefär 54 ljusår.r sig på ett avstånd av ungefär 54 ljusår.
, 船尾座9，又名BD-13 2267，HD 64096、SAO 153500、HR 3064，是船尾座的一颗恒星，视星等为5.17，位于銀經232.27，銀緯6.62，其B1900.0坐标为赤經7h 47m 8.4s，赤緯-13° 6.62′ 57″。
, 9 Puppis è una stella binaria di magnitudine 5,16 situata nella costellazione della Poppa. Dista 54 anni luce dal sistema solare.
, 9 Puppis is a binary star system in the so … 9 Puppis is a binary star system in the southern constellation of Puppis. It was originally designated 9 Argus, being part of the now defunct Argo Navis constellation. The system is faintly visible to the naked eye as a point of light with a combined apparent visual magnitude of 5.16. The magnitude difference between the two stars is 0.65. Parallax measurements yield a distance estimate to 9 Puppis of approximately 54 light years from the Sun, with the dynamic and trigonometric parallaxes for the system being in close agreement. It is drifting closer with a systemic radial velocity of –21 km/s. The motion of the system through space is predicted to bring it as close as 42.2 light-years in about 292,000 years.s 42.2 light-years in about 292,000 years.
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9 Puppis
, 船尾座9
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