Kepler-39

{{Starbox observe

| epoch = J2000

| constell = Cygnus

| ra = {{RA|19|47|50.4746}}

| dec = {{DEC|+46|02|03.500}}

| appmag_v = 14.3

}}

{{Starbox character

| class = F7V

}}

{{Starbox astrometry

| radial_v =

| prop_mo_ra = {{val|3.894|(18)}}

| prop_mo_dec = {{val|−2.345|(17)}}

| pm_footnote =

| parallax = 0.9316

| p_error = 0.0139

| parallax_footnote =

| absmag_v =

}}

{{Starbox detail

| source =

| mass = {{val|1.29|0.06|0.07}}

| radius = {{val|1.40|0.10}}

| temperature = {{val|6350|100}}

| luminosity =

| gravity = {{val|4.25|0.06}}

| metal_fe = {{val|0.10|0.14}}

| rotation = {{val|4.464|0.013|s= days}}

| rotational_velocity = {{val|16|2.5}}

| age_gyr = {{val|2.1|0.8|0.9}}

}}

{{Starbox catalog

| names = {{odlist|name=KOI-423|name2=KIC 9478990|2MASS=J19475046+4602034|Gaia DR2=2080168561154800384}}

}}

{{Starbox reference

| Simbad = Kepler-39

| KIC = 9478990

}}

Kepler-39 (2MASS J19475046+4602034) is an F-type main sequence star located in the constellation Cygnus. It is located about 3,500 light-years (1,070 parsecs) away. One known substellar companion orbits it, Kepler-39b.

Planetary system

Kepler-39b is generally considered a brown dwarf rather than a planet since it does not meet the standard definition of planet. Some authorities such as the Extrasolar Planets Encyclopaedia and the NASA Exoplanet Archive include it among their list of confirmed planets.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|20.1|1.3|1.2}}

| semimajor = {{val|0.164|0.003}}

| period = {{val|21.087210|0.000037}}

| eccentricity = {{val|0.112|0.057}}

| inclination = {{val|89.07|0.22}}

| radius = {{val|1.24|0.09|0.10}}

}}

References

{{reflist|refs=

{{cite journal | title=Improved parameters of seven Kepler giant companions characterized with SOPHIE and HARPS-N | url=https://www.aanda.org/articles/aa/full_html/2015/03/aa23042-13/aa23042-13.html | last1=Bonomo | first1=A. S. | last2=Sozzetti | first2=A. | last3=Santerne | first3=A. | last4=Deleuil | first4=M. | last5=Almenara | first5=J.-M. | last6=Bruno | first6=G. | last7=Díaz | first7=R. F. | last8=Hébrard | first8=G. | last9=Moutou | first9=C. | display-authors=1 | journal=Astronomy and Astrophysics | volume=575 | at=A85 | year=2015 | arxiv=1501.02653 | bibcode=2015A&A...575A..85B | doi=10.1051/0004-6361/201323042 | s2cid=119230291 }}

{{cite journal | title=SOPHIE velocimetry of Kepler transit candidates. III. KOI-423b: an 18 M_Jup transiting companion around an F7IV star | url=https://www.aanda.org/articles/aa/full_html/2011/09/aa17095-11/aa17095-11.html | last1=Bouchy | first1=F. | last2=Bonomo | first2=A. S. | last3=Santerne | first3=A. | last4=Moutou | first4=C. | last5=Deleuil | first5=M. | last6=Díaz | first6=R. F. | last7=Eggenberger | first7=A. | last8=Ehrenreich | first8=D. | last9=Gry | first9=C. | last10=Guillot | first10=T. | last11=Havel | first11=M. | last12=Hébrard | first12=G. | last13=Udry | first13=S. | display-authors=1 | journal=Astronomy and Astrophysics | volume=533 | at=A83 | year=2011 | arxiv=1106.3225 | bibcode=2011A&A...533A..83B | doi=10.1051/0004-6361/201117095 | s2cid=62836749 }}

{{cite encyclopedia | title=Kepler-39 b | url=https://exoplanet.eu/catalog/kepler_39_b--1376/ | encyclopedia=Extrasolar Planets Encyclopaedia | access-date=2018-06-09 }}

{{cite web | title=Kepler-39 b | url=https://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=Kepler-39+b&type=CONFIRMED_PLANET | work=NASA Exoplanet Archive | access-date=2018-06-09 }}

{{cite journal | title=Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators | last1=McQuillan | first1=A. | last2=Mazeh | first2=T. | last3=Aigrain | first3=S. | journal=The Astrophysical Journal Letters | volume=775 | issue=1 | at=L11 | year=2013 | arxiv=1308.1845 | bibcode=2013ApJ...775L..11M | doi=10.1088/2041-8205/775/1/L11 | s2cid=118557681 }}

}}

Category:Cygnus (constellation)

Category:F-type subgiants

Category:Planetary transit variables

423

Category:Planetary systems with one confirmed planet

J19475046+4602034