| 词条 | Kepler-39 |
| 释义 |
| name = Kepler-39 }}{{Starbox observe | epoch = J2000 | constell = Cygnus | ra = {{RA|19|47|50.4746}}[1] | dec = {{DEC|+46|02|03.499}}[1] | appmag_v = 14.3[3] }}{{Starbox character | class = F7V }}{{Starbox astrometry | radial_v = | prop_mo_ra = {{val|3.890|0.034}}[1] | prop_mo_dec = {{val|−2.307|0.031}}[1] | parallax = 0.9171 | p_error = 0.0164 | parallax_footnote = [1] | 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}}[9] | 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}} }}{{Starbox reference | Simbad = Kepler-39 | KIC = 9478990 }}{{Starbox end}}Kepler-39 (2MASS J19475046+4602034) is an F-type main sequence star located in the constellation Cygnus. It is located about 3,560 light-years (1,090 parsecs) away.[1] One known substellar companion orbits it, Kepler-39b.[11] Planetary systemKepler-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 there list of confirmed planets.[3][13] {{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}} }}{{Orbitbox end}} References1. ^1 {{cite journal | title=SOPHIE velocimetry of Kepler transit candidates. III. KOI-423b: an 18 MJup 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 }} [1][2][3][4][5]2. ^1 2 3 4 5 6 {{cite DR2}} Gaia Data Release 2 Vizier catalog entry 3. ^1 2 {{cite web | title=Kepler-39 b | url=http://exoplanet.eu/catalog/kepler-39_b/ | work=The Extrasolar Planets Encyclopaedia | accessdate=2018-06-09 }} 4. ^1 {{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 | accessdate=2018-06-09 }} 5. ^1 {{cite journal | title=Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators | url=http://iopscience.iop.org/article/10.1088/2041-8205/775/1/L11/meta | 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 }} }}{{Stars of Cygnus}}{{extrasolar-planet-stub}}{{subgiant-star-stub}} 4 : Cygnus (constellation)|F-type subgiants|Planetary transit variables|Kepler Objects of Interest |
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