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Kepler-419b

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 M_J and a radius of 0.96 R_J.

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]

External links[edit]

• NASA – Kepler Mission.
• NASA – Kepler Discoveries – Summary Table.
• NASA – Kepler-419batThe NASA Exoplanet Archive.
• NASA – Kepler-419batThe Exoplanet Data Explorer.
• NASA – Kepler-419batThe Extrasolar Planets Encyclopaedia.

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