HD 86081 (original) (raw)
HD 86081 ist ein 296,84 Lichtjahre von der Erde entfernter Gelber Zwerg mit einer Rektaszension von 09h 23m 47s und einer Deklination von −03° 48' 30". Er besitzt eine scheinbare Helligkeit von 8,73 mag. Im Jahre 2006 entdeckte John Asher Johnson einen extrasolaren Planeten, der diesen Stern umkreist. Dieser trägt den Namen HD 86081 b.
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| dbo:abstract | HD 86081 ist ein 296,84 Lichtjahre von der Erde entfernter Gelber Zwerg mit einer Rektaszension von 09h 23m 47s und einer Deklination von −03° 48' 30". Er besitzt eine scheinbare Helligkeit von 8,73 mag. Im Jahre 2006 entdeckte John Asher Johnson einen extrasolaren Planeten, der diesen Stern umkreist. Dieser trägt den Namen HD 86081 b. (de) HD 86081 is a yellow-hued star in the equatorial constellation of Sextans. It has the proper name Bibha, after Indian physicist Bibha Chowdhuri. The name was suggested in the NameExoWorlds competition by Ananyo Bhattacharya, a mechanical engineering student of the Sardar Vallabhbhai National Institute of Technology Surat. With an apparent visual magnitude of 8.73, this star is too dim to be viewed with the naked eye but can be seen with a small telescope. It is located at a distance of approximately 340 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +31 km/s. The stellar classification of this star is G1V, which indicates this is a G-type main-sequence star that, like the Sun, is generating energy through hydrogen fusion at its core. It is bigger and more massive than the Sun at 1.46 and 1.21 solar units respectively. The star is an estimated 3.6 billion years old and is spinning with a projected rotational velocity of 5 km/s. It is chromospherically inactive, with no emission seen in the core of the Ca II H and K lines. HD 86081 is radiating 2.9 times the luminosity of the Sun from its photosphere at an effective temperature of 5,973 K. Monitoring of this star for radial velocity variations began in November 2005 and the first companion was discovered on April 17, 2006. This hot Jupiter is orbiting just 5,180,000 km from the host star and has an orbital period of 2.1 days, one of the shortest periods ever discovered by this technique. The separation of this exoplant is sufficiently low that it may have sped up the star's rotation through tidal interaction. HD 86081 shows no evidence of planetary transits in spite of a 17.6% transit probability. There is a linear trend in the star's radial velocity measurements that may be an indicator of additional unseen companions. (en) HD 86081は、ろくぶんぎ座にある黄白色の主系列星。太陽の約1.2倍の半径と質量を持ち、表面温度は6,028Kと太陽より少し高い。2017年に、太陽の約0.08倍の質量を持つ伴星Bが発見されている。 (ja) Bibha eller HD 86081 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Sextanten. Den har en skenbar magnitud av ca 8,73 och kräver ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 9,6 mas, beräknas den befinna sig på ett avstånd på ca 340 ljusår (ca 104 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 31 km/s. (sv) HD 86081 — звезда, которая находится в созвездии Секстант на расстоянии около 297 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета. (ru) HD 86081是一顆位於六分儀座的黃-白矮星，位在天球赤道南方。它的半徑是太陽的1.22倍，質量則是太陽的1.21倍，表面溫度6028 K，光度是太陽的1.75倍。 (zh) |
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| dbp:absmagV | 3.860000 (xsd:double) |
| dbp:appmagV | 8.730000 (xsd:double) |
| dbp:class | G1V (en) |
| dbp:constell | dbr:Sextans |
| dbp:epoch | J2000.0 (en) |
| dbp:exoplanet | dbr:HD_86081_b |
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| dbp:luminosity | 2.941000 (xsd:double) |
| dbp:metalFe | +0.22 (en) |
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| rdfs:comment | HD 86081 ist ein 296,84 Lichtjahre von der Erde entfernter Gelber Zwerg mit einer Rektaszension von 09h 23m 47s und einer Deklination von −03° 48' 30". Er besitzt eine scheinbare Helligkeit von 8,73 mag. Im Jahre 2006 entdeckte John Asher Johnson einen extrasolaren Planeten, der diesen Stern umkreist. Dieser trägt den Namen HD 86081 b. (de) HD 86081は、ろくぶんぎ座にある黄白色の主系列星。太陽の約1.2倍の半径と質量を持ち、表面温度は6,028Kと太陽より少し高い。2017年に、太陽の約0.08倍の質量を持つ伴星Bが発見されている。 (ja) Bibha eller HD 86081 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Sextanten. Den har en skenbar magnitud av ca 8,73 och kräver ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 9,6 mas, beräknas den befinna sig på ett avstånd på ca 340 ljusår (ca 104 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 31 km/s. (sv) HD 86081 — звезда, которая находится в созвездии Секстант на расстоянии около 297 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета. (ru) HD 86081是一顆位於六分儀座的黃-白矮星，位在天球赤道南方。它的半徑是太陽的1.22倍，質量則是太陽的1.21倍，表面溫度6028 K，光度是太陽的1.75倍。 (zh) HD 86081 is a yellow-hued star in the equatorial constellation of Sextans. It has the proper name Bibha, after Indian physicist Bibha Chowdhuri. The name was suggested in the NameExoWorlds competition by Ananyo Bhattacharya, a mechanical engineering student of the Sardar Vallabhbhai National Institute of Technology Surat. With an apparent visual magnitude of 8.73, this star is too dim to be viewed with the naked eye but can be seen with a small telescope. It is located at a distance of approximately 340 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +31 km/s. (en) |
| rdfs:label | HD 86081 (de) HD 86081 (en) HD 86081 (ja) HD 86081 (ru) HD 86081 (sv) HD 86081 (zh) |
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