| Kepler-419b | |
| Discoverer: | Kepler spacecraft |
| Discovered: | 2012 (dubious) 12 June 2014 (confirmed) |
| Apsis: | astron |
| Semimajor: | 0.37 (± 0.007) AU |
| Eccentricity: | 0.833 (± 0.013) |
| Period: | 69.7546 (± 0.0007) d |
| Star: | Kepler-419 (KOI-1474) |
| Mean Radius: | 0.96 (± 0.12) |
| Mass: | 2.5 (± 0.3)[1] |
| Single Temperature: | 505K |
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.
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 505K.[2] It has a mass of 2.5 and a radius of 0.96 .
The planet orbits an (F-type) star named Kepler-419. The star has a mass of 1.39 and a radius 1.75 . 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.
Kepler-419c orbits its host star with 270% of the Sun's luminosity (2.7) 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.
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 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]
