View source for Kepler-737

{{Sky|19|27|27.085|+|46|25|45.89}}
{{Starbox begin
| name = Kepler-737
}}
{{Starbox observe
| epoch = J2000
| constell = [[Cygnus (constellation)|Cygnus]]<ref name=UniverseGuide>{{cite web|title = Kepler-737|accessdate=May 18, 2016|url=https://www.universeguide.com/star/122022/kepler737|website=Universe Guide}}</ref>
| ra = {{RA|19|27|27.085}}<ref name = raanddec>{{cite web|title = Kepler-737's Documentary in NASA Exoplanet Archive|accessdate=May 18, 2016|url=https://exoplanetarchive.ipac.caltech.edu/overview/Kepler-737#star_Kepler-737_collapsible|website=NASA Exoplanet Archive}}</ref> 
| dec = {{DEC|+46|25|45.89}}<ref name = raanddec/>
}}
{{Starbox character
| type = [[main-sequence]]<ref name = Kyoto>{{cite web|title=Kepler-737|accessdate=May 18, 2016|url=http://www.exoplanetkyoto.org/exohtml/Kepler-737.html|website=Exoplanet Kyoto}}</ref>
| class = M0V<ref name = Kyoto/>
|appmag_1_passband = G 
|appmag_1 = 15.127694<ref name= SIMBAD1> {{cite web|title=Kepler-737|accessdate=May 18, 2016|url=https://simbad.u-strasbg.fr/simbad/sim-id?Ident=Kepler-737|website=SIMBAD}} </ref>
|appmag_2_passband = J
|appmag_2 = 12.910<ref name= SIMBAD1/>
|appmag_3_passband = H
|appmag_3 = 12.293<ref name= SIMBAD1/>
|appmag_4_passband = K
|appmag_4 = 12.097<ref name= SIMBAD1/>
|appmag_5_passband = B
|appmag_5 = 17.861<ref name= raanddec/>
|appmag_6_passband = V
|appmag_6 = 15.971<ref name= raanddec/>
|appmag_7_passband = W
|appmag_7 = 11.969<ref name= raanddec/>
}}
{{Starbox astrometry
|parallax = 4.859
|prop_mo_ra = 20.094
|prop_mo_dec = -19.889
|p_error = 0.0194
}}
{{Starbox detail
 | mass = 0.510{{±|0.0026|0.0027}}
 | luminosity = ~0.045
 | temperature = 3,813{{±|40.127|38.492}}<ref name=Kyoto/>
 | radius = 0.480{{±|0.0026|0.0024}}
 | age_gyr = 3.89
 | gravity = 4.722±0.008
 | metal_fe = -0.24 {{±|0.087|0.081}}
}}
{{Starbox catalog
| names = {{odlist|2MASS=J19272708+4625453|KIC=9710326|KOI=947|WISE=J192727.10+462545.1|Gaia DR2=2126820324123177472|TIC=63068329}}
}}
{{Starbox reference
 | Simbad = Kepler-737
}}
{{Starbox end}}

'''Kepler-737''' is an M-Type main-sequence red dwarf located 671 light-years away in the constellation [[Cygnus (constellation)|Cygnus]]. It was discovered by [[HARPS]] using the [[transit (astronomy)|transit]] method and announced on May 10, 2016.<ref name=Discovery/> To the naked eye, it appears a single faint star of its magnitude.<ref name= SIMBAD1/>

==Physical properties==
===General Properties===
Kepler-737 is around half the size of the [[Sun]], with a mass of 0.51 solar masses and a radius of 0.48 solar radii.<ref name=UniverseGuide/> It's [[spectral class]] is M0V, its temperature is about 3,813 [[Kelvin]], with a brightness of 0.045 solar luminosity.<ref name=raanddec/> Scientists proclaimed the different stellar ages of the star because of celestial bodies, one of KOI Table claimed a star to be 14 billion years old. Its age can range from 3.8 to 14.6 billion years old. <ref name=raanddec/> 

As for the logarithm of the relative abundance of Iron and Hydrogen, its Metallicity [Fe/H] is -0.24{{±|0.087|0.081}} dex, containing Iron and Hydrogen on its core, significantly lower than the Sun's. Its density is rough ~5.239±0.265 g/cm3.<ref name=raanddec/> Its gravity is weaker than the [[Sun]], have at least 4.722±0.008 [[cgs]] with a base-10 logarithm (log g). Its stellar density is about ~5.239±0.265 [[g/cm3|g/cm³ Solar Density]], while the sun has about 1.41 [[g/cm³]] solar density<ref name=raanddec/>

===Astrometry and Characteristics===
[[SIMBAD]] data indicate that its proper motion is 20.094 mas/yr for Right ascension, -19.889 mas/yr for Declination, its parallax is 4.859 [[Minute and second of arc|mas]]<ref name= SIMBAD1/>. There are many confirmed [[apparent magnitudes]] pending on [[NASA]] headquarters, these apparent magnitudes employed to measure the brightness of a star Kepler-737 with their filter names. Its distance is alternatively 205.8 ± 0.8 [[Parsec|pc]]

==Planetary System==

{{OrbitboxPlanet begin}}<ref name=Discovery/>
{{OrbitboxPlanet 
| exoplanet = [[Kepler-737b|b]]
| mass_earth = ~4.5
| period = 28.592
| semimajor = 0.035
| radius_earth = 1.96±0.11	
| eccentricity = 0
| inclination = 89.99
}}
{{Orbitbox end}}

===Kepler-737b===
[[File:Lalande 21185.png|thumb|An transiting planet orbing a star Kepler-737]]
{{Main|Kepler-737b}}
Kepler-737b<ref name=Discovery>{{cite web|title=Planet beyond our solar system: Kepler-737b|accessdate=May 18, 2016|url=https://exoplanets.nasa.gov/exoplanet-catalog/5111/kepler-737-b|website=Exoplanet Exploration}}</ref> was discovered and suspected since May 18, 2016, for orbiting in the habitable zone but not likely to be inhabitable because Kepler-737b is tidally locked.<ref>{{Cite web|title=Tidally locked exoplanets may be more common than previously thought|url=https://www.washington.edu/news/2017/08/14/tidally-locked-exoplanets-may-be-more-common-than-previously-thought/|access-date=2021-05-18|website=UW News|language=en}}</ref> <ref>{{Cite journal|last1=Hammond|first1=Mark|last2=Lewis|first2=Neil T.|date=2021-03-30|title=The rotational and divergent components of atmospheric circulation on tidally locked planets|journal=Proceedings of the National Academy of Sciences|language=en|volume=118|issue=13|pages=e2022705118|doi=10.1073/pnas.2022705118|issn=0027-8424|pmid=33753500|pmc=8020661|arxiv=2102.11760|bibcode=2021PNAS..11822705H}}</ref><ref>{{Cite web|date=2021-03-08|first=Paul|last=Sutter|title=Can super-rotating oceans cool off extreme exoplanets?|url=https://www.space.com/super-rotating-oceans-extreme-exoplanets|access-date=2021-05-18|website=Space.com|language=en}}</ref> Kepler-737b may instead have atmospheric circulation that would distribute the heat around the planet, potentially making a large portion of it habitable, although given its stellar flux the most likely scenario is that the planet's surface is too hot to be habitable. Water on Kepler-737b's surface could also distribute heat.

On the note of the Exoplanet Archive, ''Kepler-737b'' was dedicated that [[orbital period]], transit mid-point, transit duration, Rp/Rs, and their errors are taken from DR24 KOI table<ref name=raanddec/>

==References==
{{Reflist|30em}}

{{Stars of Cygnus}}
{{2016 in space}}

[[Category:Planetary systems with one confirmed planet]]
[[Category:M-type main-sequence stars]]
[[Category:Cygnus (constellation)]]
[[Category:TESS Objects of Interest|0755]]