View source for Kepler 22

{{short description|Star}}
{{Starbox begin
| name = Kepler-22
}}
{{Starbox image
| image = [[File:Kepler-22 diagram.jpg|250px]]
| caption = A diagram of the Kepler-22b System, compared to our Inner Solar System.
}}
{{Starbox observe
| epoch = J2000
| ra = {{RA|19|16|52.1904}}<ref name="Gaia DR2"/>
| dec = {{DEC|+47|53|03.948}}<ref name="Gaia DR2"/>
| constell = [[Cygnus (constellation)|Cygnus]]<ref name=IAU_const/>
| appmag_v = 11.664<ref name=nasa_ames/>
}}
{{Starbox character
| class = G5V<ref name=epe/><!-- NOTE: Please don't add a 'V' here until it is established as such by a reliable source. -->
| appmag_1_passband =  <!-- Passband for first apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_1 = <!-- Value of first apparent magnitude  -->
| appmag_2_passband =  <!-- Passband for second apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_2 =<!-- Value of second apparent magnitude  -->
| appmag_3_passband =  <!-- Passband for third apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_3 = <!-- Value of third apparent magnitude  -->
| appmag_4_passband =  <!-- Passband for fourth apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_4 = <!-- Value of fourth apparent magnitude  -->
| appmag_5_passband =  <!-- Passband for fifth apparent magnitude (e.g., H, J, K, etc.) -->
| appmag_5 = <!-- Value of fifth apparent magnitude  -->
| r-i = <!--R-I color-->
| v-r = <!--V-R color-->
| b-v =  <!--B-V color-->
| u-b = <!--U-B color-->
| variable = <!--Variability type-->
}}
{{Starbox astrometry
| radial_v =
| prop_mo_ra = {{val|−39.717|0.052}}<ref name="Gaia DR2"/>
| prop_mo_dec = {{val|−66.687|0.046}}<ref name="Gaia DR2"/>
| parallax = 5.1088
| p_error = 0.0242
| parallax_footnote = <ref name="Gaia DR2"/>
| absmag_v = ~5.27<!--11.664V-5(log190-1)=5.27Mv, probably nearer 5.1 if interstellar extinction is taken into account-->
| absmag_bol = ~4.98<!---4.74Mbol(sun)-(log0.8*2.5)=4.98-->
}}
{{Starbox detail
| mass = {{nowrap|0.970 ± 0.060}}<ref name=nasa_ames/>
| radius = {{nowrap|0.979 ± 0.020}}<ref name=nasa_ames/>
| luminosity = {{nowrap|0.79 ± 0.04}}<ref name=nasa_ames/>
| luminosity_bolometric = 0.8<!--(0.979^2)*((5518/5772)^4)=0.8005Luminositybolometric-->
| luminosity_visual = ~0.67<!--10^((4.83SolMv-5.27StarMv)*.4)=0.6668LuminosityVisual & probably around 0.75 if interstellar extinction is accounted for-->
| temperature = {{nowrap|5518 ± 44}}<ref name=nasa_ames/>
| metal_fe = {{nowrap|–0.29 ± 0.06}}<ref name=nasa_ames/>
| rotational_velocity = {{nowrap|0.6 ± 1.0}}<ref name=nasa_ames/>
| age =
}}
{{Starbox catalog
| names = {{odlist | 2MASS=J19165219+4753040 | GSC=03546-02301 | KIC=10593626 | KOI=87|Gaia DR2=2127941757262806656}}<ref name=SIMBAD/>
}}
{{Starbox reference
| Simbad = Kepler-22
| KIC = 10593626
}}
{{Starbox end}}
'''Kepler-22''' is a sun-like [[star]] in the northern [[constellation]] of [[Cygnus (constellation)|Cygnus]], the swan, that is orbited by a planet found to be unequivocally within the star's [[habitable zone]]. It is located at the [[celestial coordinates]]: Right Ascension {{RA|19|16|52.2}}, Declination {{DEC|+47|53|4.2}}.<ref name=keplerdiscoveries>{{cite web |title=Kepler Discoveries |date=2011-12-05 |url=http://kepler.nasa.gov/Mission/discoveries/ }}</ref> With an [[apparent visual magnitude]] of 11.7,<ref name=nasa_ames/> this star is too faint to be seen with the naked eye. It can be viewed with a telescope having an [[aperture]] of at least {{Convert|4|in|cm|abbr=on}}.<ref name=sherrod_koed2003/> The estimated distance to Kepler-22 is {{Convert|638|ly|pc|abbr=off|lk=on}}.<ref name="Gaia DR2"/>