HD 109271 (original) (raw)
HD 109271 is a star in the constellation of Virgo. With an apparent magnitude of 8.05, it cannot be seen with the naked eye. Parallax measurements made by Gaia put the star at a distance of 182 light-years (56.0 parsecs) away. HD 109271 is a typical G-type main-sequence star. It has a mass of 1.047 M☉, but is twice as luminous as the Sun. It is also much older, at an age of 7.3 billion years. In 2020, a red dwarf companion of 0.6M☉ was found orbiting HD 109271 at projected separation 304 AU.
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| dbo:abstract | HD 109271 is a star in the constellation of Virgo. With an apparent magnitude of 8.05, it cannot be seen with the naked eye. Parallax measurements made by Gaia put the star at a distance of 182 light-years (56.0 parsecs) away. HD 109271 is a typical G-type main-sequence star. It has a mass of 1.047 M☉, but is twice as luminous as the Sun. It is also much older, at an age of 7.3 billion years. In 2020, a red dwarf companion of 0.6M☉ was found orbiting HD 109271 at projected separation 304 AU. (en) HD 109271 est une étoile naine (classe de luminosité V) jaune (classe de spectrale G5) de la partie australe de la constellation zodiacale de la Vierge. Située à une distance de 55,96 ± 0,21 pc (∼183 a.l.) du Soleil, sa magnitude apparente n'est que de 8,05 dans le spectre visible et elle n'est pas observable à l'œil nu depuis la Terre. D'une masse de 1,047 ± 0,024 masse solaire, elle est l'objet primaire d'un système planétaire comprenant HD 109271 b et HD 109271 c, deux planètes confirmées. L'existence d'une troisième planète, HD 109271 d, reste à ce jour (mai 2015) hypothétique. (fr) HD 109271 — звезда, которая находится в созвездии Дева на расстоянии около 202 световых лет от нас. Вокруг звезды обращаются, как минимум, две планеты. (ru) HD 109271 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Jungfrun. Den har en skenbar magnitud av ca 8,05 och kräver åtminstone en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 17,9 mas, beräknas den befinna sig på ett avstånd på ca 182 ljusår (ca 56 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -5 km/s. (sv) |
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| dbp:absmagV | 4.100000 (xsd:double) |
| dbp:ageGyr | 7.300000 (xsd:double) |
| dbp:appmagV | 8.050000 (xsd:double) |
| dbp:bV | (en) +0.658 ± 0.002 (en) |
| dbp:class | G5 V (en) |
| dbp:constell | dbr:Virgo_(constellation) |
| dbp:eccentricity | 0.150000 (xsd:double) 0.250000 (xsd:double) 0.360000 (xsd:double) |
| dbp:epe | HD+109271 (en) |
| dbp:epoch | J2000.0 (en) |
| dbp:exoplanet | dbr:HD_109271_b dbr:HD_109271_c dbr:HD_109271_d |
| dbp:gravity | 4.280000 (xsd:double) |
| dbp:luminosity | 2 (xsd:integer) |
| dbp:mass | 1.047000 (xsd:double) >0.054 ± 0.004 (en) >0.076 ± 0.007 (en) >1.3 neptune (en) |
| dbp:metalFe | 0.100000 (xsd:double) |
| dbp:nsted | HD+109271 (en) |
| dbp:pError | 0.066000 (xsd:double) |
| dbp:parallax | 17.869700 (xsd:double) |
| dbp:period | 7.854300 (xsd:double) 30.930000 (xsd:double) 430 (xsd:integer) |
| dbp:periodUnit | day (en) |
| dbp:radialV | −5.10 ± 0.3 (en) |
| dbp:rotationalVelocity | 2.700000 (xsd:double) |
| dbp:semimajor | 0.079000 (xsd:double) 0.196000 (xsd:double) 1 (xsd:integer) |
| dbp:simbad | LTT+4770 (en) |
| dbp:temperature | 5783 (xsd:integer) |
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| gold:hypernym | dbr:Star |
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| rdfs:comment | HD 109271 is a star in the constellation of Virgo. With an apparent magnitude of 8.05, it cannot be seen with the naked eye. Parallax measurements made by Gaia put the star at a distance of 182 light-years (56.0 parsecs) away. HD 109271 is a typical G-type main-sequence star. It has a mass of 1.047 M☉, but is twice as luminous as the Sun. It is also much older, at an age of 7.3 billion years. In 2020, a red dwarf companion of 0.6M☉ was found orbiting HD 109271 at projected separation 304 AU. (en) HD 109271 est une étoile naine (classe de luminosité V) jaune (classe de spectrale G5) de la partie australe de la constellation zodiacale de la Vierge. Située à une distance de 55,96 ± 0,21 pc (∼183 a.l.) du Soleil, sa magnitude apparente n'est que de 8,05 dans le spectre visible et elle n'est pas observable à l'œil nu depuis la Terre. D'une masse de 1,047 ± 0,024 masse solaire, elle est l'objet primaire d'un système planétaire comprenant HD 109271 b et HD 109271 c, deux planètes confirmées. L'existence d'une troisième planète, HD 109271 d, reste à ce jour (mai 2015) hypothétique. (fr) HD 109271 — звезда, которая находится в созвездии Дева на расстоянии около 202 световых лет от нас. Вокруг звезды обращаются, как минимум, две планеты. (ru) HD 109271 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Jungfrun. Den har en skenbar magnitud av ca 8,05 och kräver åtminstone en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 17,9 mas, beräknas den befinna sig på ett avstånd på ca 182 ljusår (ca 56 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -5 km/s. (sv) |
| rdfs:label | HD 109271 (en) HD 109271 (fr) HD 109271 (ru) HD 109271 (sv) |
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| prov:wasDerivedFrom | wikipedia-en:HD_109271?oldid=1122855833&ns=0 |
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| foaf:name | HD 109271 (en) |
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