Kepler-419b: Difference between revisions

{{Planetbox begin

| name = Kepler-419b

{{Planetbox star

| star = [[Kepler-419]] (KOI-1474)

| ra= {{RA|19|41|40.3}}

| dec= {{DEC|+51|11|05.15}}

| constell=[[Cygnus (constellation)|Cygnus]]

| app_mag = 14<ref name=EPE>{{cite web|url=http://exoplanet.eu/catalog/kepler-419_c/|title=Notes for planet Kepler-419 c|work=[[The Extrasolar Planets Encyclopedia]]|accessdate=August 8, 2016}}</ref>

| dist_ly = >3000

| dist_pc = >920

| class = F?V<ref name="PHL"/>

| mass = 1.39 (± 0.08)<ref name="Dawson"/>

| radius = 1.75 (± 0.08)<ref name="Dawson"/>

| temperature = 6430 (± 79)<ref name="Dawson"/>

| metallicity = 0.176 (± 0.07)<ref name="Dawson"/>

| age = 2.8 (± 1.3)<ref name=EPE/>

}}

{{Planetbox character

| mass = 2.5 (± 0.3)<ref name="Dawson">{{Cite journal|last= |first= |author-link= |arxiv=1405.5229 |title= Large eccentricity, low mutual inclination: The three-dimensional architecture of a hierarchical system of giant planets|journal= The Astrophysical Journal|volume= 791|issue= 2|pages= 89|date= |last1= Dawson|first1= Rebekah I.|author2= John Asher Johnson|last3= Fabrycky|first3= Daniel C.|last4= Foreman-Mackey|first4= Daniel|last5= Murray-Clay|first5= Ruth A.|last6= Buchhave|first6= Lars A.|last7= Cargile|first7= Phillip A.|last8= Clubb|first8= Kelsey I.|last9= Fulton|first9= Benjamin J.|last10= Hebb|first10= Leslie|last11= Howard|first11= Andrew W.|last12= Huber|first12= Daniel|last13= Shporer|first13= Avi|last14= Valenti|first14= Jeff A.|year= 2014|doi= 10.1088/0004-637X/791/2/89}}</ref>

| radius = 0.96 (± 0.12)<ref name="Dawson"/>

| stellar_flux = 34.66

| temperature = {{convert|505|K|C F}}

}}

{{Planetbox orbit

| semimajor = 0.37 (± 0.007)<ref name="Dawson" />

| eccentricity = 0.833 (± 0.013)<ref name="Dawson" />

| period = 69.7546 (± 0.0007)<ref name="Dawson" />

| inclination = {{val|88.95|0.14|0.17}}<ref name="Dawson"/>

}}

{{Planetbox discovery

| discovery_date = 2012 (dubious)<br>12 June 2014 (confirmed)<ref name="Dawson" />

| discoverers = ''[[Kepler (spacecraft)|Kepler]]'' spacecraft

| discovery_method = [[Transit method|Transit method]]<ref name="Dawson" />

| discovery_status = Published

}}

{{Planetbox catalog

| names = KOI-1474.01, KIC 12365184 b, WISE J194140.29+511105.1 b, 2MASS J19414029+5111051 b

}}

{{Planetbox reference

| star = Kepler-419

| planet = b

}}

{{Planetbox end}}

'''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)|Kepler spacecraft]]. It is located beyond 3,000 [[light-year]]s (920 [[parsec]]s, or nearly {{val|2.8382|e=16}} [[km]]) from Earth in the constellation [[Cygnus (constellation)|Cygnus]].<ref name="Dawson"/> The exoplanet was found by using the [[transit method], in which the dimming effect that a planet causes as it crosses in front of its star is measured.

== Characteristics ==

Kepler-419b is a [[hot Jupiter]], an exoplanet that has a radius and mass near that of the planet [[Jupiter]], but with an extremely high temperature. It has a temperature of {{convert|505|K|C F}}.<ref name="PHL">http://www.hpcf.upr.edu/~abel/phl/hec_plots/hec_orbit/hec_orbit_Kepler-419_b.png</ref> It has a mass of 2.5 {{Jupiter mass}} and a radius of 0.96 {{Jupiter radius}}.

The planet orbits an ([[Stellar classification#Class F|F-type]]) [[star]] named [[Kepler-419]]. The star has a mass of 1.39 {{Solar mass}} and a radius 1.75 {{Solar radius}}. It has a surface temperatures of 6430 [[Kelvin|K]] and is 2.8 billion years old. In comparison, the Sun is about 4.6 billion years old<ref>{{cite web |url=http://www.universetoday.com/18237/how-old-is-the-sun/ |title=How Old is the Sun? |author=Fraser Cain |date=16 September 2008 |work= |publisher=Universe Today |accessdate=19 February 2011}}</ref> and has a surface temperature of 5778 K.<ref>{{cite web |url=http://www.universetoday.com/18092/temperature-of-the-sun/ |title=Temperature of the Sun |author=Fraser Cain |date=September 15, 2008 |work= |publisher=Universe Today |accessdate=19 February 2011}}</ref>

The star's [[apparent magnitude]], or how bright it appears from Earth's perspective, is 14. It is too dim to be seen with the naked eye.

=== Orbit ===

Kepler-419c orbits its host star with 264% of the Sun's luminosity (2.64 {{solar luminosity}}) about every 67 days at a distance of 0.37 [[astronomical unit|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)|Kepler]] spacecraft was completing observing stars on its [[photometer]], the instrument it uses to detect [[transit method|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 {{val|50,000}} 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.

{{reflist}}

* [http://www.nasa.gov/mission_pages/kepler/main/index.html NASA – Kepler Mission].

* [http://kepler.nasa.gov/Mission/discoveries/ NASA – Kepler Discoveries – Summary Table].

* [http://exoplanet.eu/catalog/kepler-419_b/ NASA – Kepler-419b] at [[Extrasolar Planets Encyclopaedia|The Extrasolar Planets Encyclopaedia]].

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[[Category:Exoplanets discovered by Kepler (spacecraft)]]