HD 131399
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Triple star HD 131399 |
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| SPHERE image of HD 131399 A (top left), B and C (bottom right) as well as the background object that was mistaken for an exoplanet (left of center of image) | ||
| Observation data epoch : J2000.0 |
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| AladinLite | ||
| Constellation | centaur | |
| Right ascension | 14 h 54 m 25.3 s | |
| declination | -34 ° 08 ′ 34 ″ | |
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Vis. Brightness (total) |
7.1 likes | |
| Astrometry | ||
| parallax | 10.20 ± 0.70 mas | |
| distance | 351 +15−12 Lj (107.9 +4.5−3.7 pc ) |
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| period | A- (BC): 3556 ± 36 a | |
| Age | 21.9 +4.1−3.8 Ma | |
| Proper movement | ||
| Rec. Share: | −29.69 ± 0.59 mas / a | |
| Dec. portion: | −31.52 ± 0.55 mas / a | |
| Individual data | ||
| Names | A, B, C | |
| Typing: | ||
| Spectral class | A. | A1 V |
| B. | G | |
| C. | K | |
| Physical Properties: | ||
| Dimensions | A. | 2.08 +0.12−0.11 M ☉ |
| B. | 0.95 ± 0.04 M ☉ | |
| C. | 0.35 ± 0.04 M ☉ | |
| Effective temperature | A. | 9480 +420−410 K |
| B. | 4890 +190−170 K | |
| C. | 3460 ± 60 K | |
| Designations and catalog entries | ||
| HD catalog | HD 131399 | |
| SAO catalog | SAO 206071 | |
| Hipparcos catalog | HIP 72940 | |
| WDS catalog | WDS J14544-3409 | |
HD 131399 is a young star system in the constellation Centaurus at a distance of about 350 light years . The most massive star in the system is HD 131399 A , a main sequence star belonging to the spectral class A1. The other two stars, HD 131399 B and HD 131399 C , are main sequence stars of the spectral classes G and K. As a double star, they orbit HD 131399 A together with an orbital period of almost 3600 years.
HD 131399 from
In 2016, the discovery of an exoplanet was published that appeared to orbit the star HD 131399 A and was given the systematic name HD 131399 Ab . The corresponding investigation was carried out by direct observation with the SPHERE instrument of the Very Large Telescope at the European Southern Observatory in the Chilean Atacama Desert . Later, however, after an investigation with the Gemini Planet Imager , it was found that the supposed discovery was probably due to a background star.
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- ↑ Kevin Wagner, Dániel Apai, Markus Kasper, Kaitlin Kratter, Melissa McClure, Massimo Robberto, Jean-Luc Beuzit: Direct imaging discovery of a Jovian exoplanet within a triple-star system . In: Science . July 7, 2016. arxiv : 1607.02525 . doi : 10.1126 / science.aaf9671 .
- ↑ Eric L. Nielsen, Robert J. De Rosa, Julien Rameau, Jason J. Wang, Thomas M. Esposito, Maxwell A. Millar-Blanchaer, Christian Marois, Arthur Vigan, S. Mark Ammons: Evidence that the Directly-Imaged Planet HD 131399 Ab is a Background Star . In: The Astronomical Journal . 2017. arxiv : 1705.06851 . bibcode : 2017AJ .... 154..218N . doi : 10.3847 / 1538-3881 / aa8a69 .