HD 97658 (original) (raw)
HD 97658 est une étoile naine orange située à une distance de ∼70,4 a.l. (∼21,6 pc) du Soleil, dans la constellation zodiacale du Lion. Elle est l’objet primaire d’un système planétaire dont l’unique objet secondaire connu est HD 97658 b, une planète de type super-Terre.
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| dbo:abstract | HD 97658 is a star with an exoplanetary companion in the equatorial constellation of Leo. The star is too dim to be seen with the naked eye, having an apparent visual magnitude of 7.76. It is located at a distance of 70 light years based on parallax, but is slowly drifting closer with a radial velocity of −1.6 km/s. This is an ordinary K-type main-sequence star with a stellar classification of K1V. The star has 77% of the mass and 73% of the radius of the Sun. Estimates of the star's age ranges from four to six billion years. It is spinning with a rotation period of around 39 days and shows a magnetic activity cycle of 9.6 years, which is slightly shorter than the solar cycle. The chromospheric activity is lower than average for stars of this class. HD 97658 is radiating 35% of the luminosity of the Sun from its photosphere at an effective temperature of 5,212 K. The star has a low metallicity – the atmospheric abundance of elements with a higher atomic number than helium, which explains why it lies 0.46 magnitudes below average for main sequence stars of its type. (en) HD 97658 est une étoile naine orange située à une distance de ∼70,4 a.l. (∼21,6 pc) du Soleil, dans la constellation zodiacale du Lion. Elle est l’objet primaire d’un système planétaire dont l’unique objet secondaire connu est HD 97658 b, une planète de type super-Terre. (fr) HD 97658 (BD+26°2184) — звезда, которая находится в созвездии Лев на расстоянии около 68,8 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета. (ru) HD 97658 är en ensam stjärna belägen i den norra delen av stjärnbilden Lejonet. Den har en skenbar magnitud av ca 6,27 och är kräver åtminstone en handkikare för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 46,3 mas, beräknas den befinna sig på ett avstånd på ca 70 ljusår (ca 22 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -2 km/s. (sv) HD 97658是一顆距離地球69光年的恆星，位於獅子座。該恆星的視星等6.27，接近肉眼所見恆星極限，必須使用望遠鏡才較易觀測。該恆星是一顆貧金屬橙矮星，年齡高於太陽。 (zh) |
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| dbp:ageGyr | 3.900000 (xsd:double) |
| dbp:appmagV | 7.762000 (xsd:double) |
| dbp:class | K1V (en) |
| dbp:constell | dbr:Leo_(constellation) |
| dbp:eccentricity | 0.030000 (xsd:double) |
| dbp:epoch | J2000.0 (en) |
| dbp:exoplanet | b (en) |
| dbp:gravity | 4.520000 (xsd:double) |
| dbp:inclination | 89.600000 (xsd:double) |
| dbp:luminosityBolometric | 0.351000 (xsd:double) |
| dbp:mass | 0.773000 (xsd:double) |
| dbp:massEarth | 7.810000 (xsd:double) |
| dbp:pError | 0.022000 (xsd:double) |
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| dbp:period | 9.490730 (xsd:double) |
| dbp:propMoDec | 48.662000 (xsd:double) |
| dbp:propMoRa | −107.534 (en) |
| dbp:radius | 0.728000 (xsd:double) |
| dbp:radiusEarth | 2.247000 (xsd:double) |
| dbp:semimajor | 0.079600 (xsd:double) |
| dbp:temperature | 5212 (xsd:integer) |
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| dbp:variable | dbr:Variable_star |
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| rdfs:comment | HD 97658 est une étoile naine orange située à une distance de ∼70,4 a.l. (∼21,6 pc) du Soleil, dans la constellation zodiacale du Lion. Elle est l’objet primaire d’un système planétaire dont l’unique objet secondaire connu est HD 97658 b, une planète de type super-Terre. (fr) HD 97658 (BD+26°2184) — звезда, которая находится в созвездии Лев на расстоянии около 68,8 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета. (ru) HD 97658 är en ensam stjärna belägen i den norra delen av stjärnbilden Lejonet. Den har en skenbar magnitud av ca 6,27 och är kräver åtminstone en handkikare för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 46,3 mas, beräknas den befinna sig på ett avstånd på ca 70 ljusår (ca 22 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -2 km/s. (sv) HD 97658是一顆距離地球69光年的恆星，位於獅子座。該恆星的視星等6.27，接近肉眼所見恆星極限，必須使用望遠鏡才較易觀測。該恆星是一顆貧金屬橙矮星，年齡高於太陽。 (zh) HD 97658 is a star with an exoplanetary companion in the equatorial constellation of Leo. The star is too dim to be seen with the naked eye, having an apparent visual magnitude of 7.76. It is located at a distance of 70 light years based on parallax, but is slowly drifting closer with a radial velocity of −1.6 km/s. (en) |
| rdfs:label | HD 97658 (fr) HD 97658 (en) HD 97658 (ru) HD 97658 (sv) HD 97658 (zh) |
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