Kepler-419b
| Discovery | |
|---|---|
| Discovered by | Kepler spacecraft |
| Discovery date | 2012 (dubious) 12 June 2014 (confirmed)[1] |
| Transit method[1] | |
| Orbital characteristics | |
| 0.37 (± 0.007)[1] AU | |
| Eccentricity | 0.833 (± 0.013)[1] |
| 69.7546 (± 0.0007)[1] d | |
| Inclination | 88.95+0.14 −0.17[1] |
| Star | Kepler-419 (KOI-1474) |
| Physical characteristics | |
| 0.96 (± 0.12)[1] RJ | |
| Mass | 2.5 (± 0.3)[1] MJ |
| Temperature | 505 K (232 °C; 449 °F) |
Kepler-419b (also known by its Kepler Object of Interest designation KOI-1474.01) is a hot Jupiter exoplanet orbiting the star Kepler-419, the outermost of two such planets discovered by NASA's Kepler spacecraft. It is located about 3,400 light-years (1040 parsecs from Earth in the constellation Cygnus.
Characteristics
[edit]Mass, radius and temperature
[edit]Kepler-419b is a hot Jupiter, an exoplanet that has a radius and mass near that of the planet Jupiter, but with a much higher temperature. It has a temperature of 505 K (232 °C; 449 °F).[2] It has a mass of 2.5 MJ and a radius of 0.96 RJ.
Host star
[edit]The planet orbits an (F-type) star named Kepler-419. The star has a mass of 1.39 M☉ and a radius 1.75 R☉. It has a surface temperatures of 6430 K and is 2.8 billion years old. In comparison, the Sun is about 4.6 billion years old[3] and has a surface temperature of 5778 K.[4]
The star's apparent magnitude, or how bright it appears from Earth's perspective, is 13. It is too dim to be seen with the naked eye.
Orbit
[edit]Kepler-419c orbits its host star with 270% of the Sun's luminosity (2.7 L☉) about every 67 days at a distance of 0.37 AU (close to the orbital distance of Mercury from the Sun, which is 0.38 AU). It has a highly eccentric orbit, with an eccentricity of 0.833.
Discovery
[edit]In 2009, NASA's Kepler spacecraft was completing observing stars on its photometer, the instrument it uses to detect transit events, in which a planet crosses in front of and dims its host star for a brief and roughly regular period of time. In this last test, Kepler observed 50000 stars in the Kepler Input Catalog, including Kepler-419, the preliminary light curves were sent to the Kepler science team for analysis, who chose obvious planetary companions from the bunch for follow-up at observatories. Observations for the potential exoplanet candidates took place between 13 May 2009 and 17 March 2012. After observing the respective transits, the first planet, Kepler-419b, was announced.[1]
References
[edit]- ^ a b c d e f g h i Dawson, Rebekah I.; John Asher Johnson; Fabrycky, Daniel C.; Foreman-Mackey, Daniel; Murray-Clay, Ruth A.; Buchhave, Lars A.; Cargile, Phillip A.; Clubb, Kelsey I.; Fulton, Benjamin J.; Hebb, Leslie; Howard, Andrew W.; Huber, Daniel; Shporer, Avi; Valenti, Jeff A. (2014). "Large eccentricity, low mutual inclination: The three-dimensional architecture of a hierarchical system of giant planets". The Astrophysical Journal. 791 (2): 89. arXiv:1405.5229. Bibcode:2014ApJ...791...89D. doi:10.1088/0004-637X/791/2/89. S2CID 29630098.
- ^ Kepler 419 hpcf.upr.edu
- ^ Fraser Cain (16 September 2008). "How Old is the Sun?". Universe Today. Retrieved 19 February 2011.
- ^ Fraser Cain (September 15, 2008). "Temperature of the Sun". Universe Today. Retrieved 19 February 2011.
External links
[edit]- NASA – Kepler Mission.
- NASA – Kepler Discoveries – Summary Table.
- NASA – Kepler-419b at The NASA Exoplanet Archive.
- NASA – Kepler-419b at The Exoplanet Data Explorer.
- NASA – Kepler-419b at The Extrasolar Planets Encyclopaedia.
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