| 词条 | Kepler-27 |
| 释义 |
| name = Kepler-31 }}{{Starbox observe | epoch = J2000 | constell = Cygnus[1] | ra = {{RA|19|28|56.8195}} | dec = {{DEC|+41|05|09.141}} | appmag_v = 15.855[2] }}{{Starbox character | class = G5[3] | appmag_1_passband = | appmag_1 = | appmag_2_passband = | appmag_2 = | appmag_3_passband = | appmag_3 = | appmag_4_passband = | appmag_4 = | appmag_5_passband = | appmag_5 = | r-i = | v-r = | b-v = | u-b = | variable = }}{{Starbox astrometry | radial_v = | prop_mo_ra = {{val|2.250|0.065}} | prop_mo_dec = {{val|−0.326|0.060}} | parallax = 0.9301 | p_error = 0.0360 | parallax_footnote = | absmag_v = }}{{Starbox detail | mass = {{nowrap|0.65}}[2] | luminosity = {{nowrap|0.59}}[2] | temperature = {{nowrap|5400}}[2] | metal_fe = {{nowrap|0.41}}[2] | radius = {{nowrap|}}[2] | rotational_velocity = {{nowrap|0.6}}[2] | age = }}{{Starbox catalog | names = KOI-935, KIC 9347899, 2MASS J19360552+4551110 }}{{Starbox reference | Simbad = Kepler-27 | KIC = 9347899 }}{{Starbox end}} Kepler-27 is a star in the northern constellation of 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|28|56.825}}, Declination {{DEC|+41|05|09.15}}.[4] With an apparent visual magnitude of 15.855,[2] this star is too faint to be seen with the naked eye. {{OrbitboxPlanet begin| table_ref = [3] }}{{OrbitboxPlanet | exoplanet = b | mass = 9.11 | semimajor = 0.118 | period = 15.3348 | radius_earth = }}{{OrbitboxPlanet | exoplanet = c | mass = 13.8 | semimajor = 0.191 | period = 31.3309 | radius_earth = 4.1 }}{{Orbitbox end}} References1. ^{{citation | contribution=Cygnus – constellation boundary | title=The Constellations | publisher=International Astronomical Union | url=http://www.iau.org/public/constellations/#cyg | accessdate=2011-12-15 }} Gaia Data Release 2 Vizier catalog entry2. ^1 2 3 4 5 6 7 {{citation | title=Kepler-31b | publisher=NASA Ames Research Center | url=http://kepler.nasa.gov/Mission/discoveries/kepler30b/ | accessdate=2011-12-06 }} 3. ^1 {{citation |first1=Jean |last1=Schneider |title=Star: Kepler-31 |work=Extrasolar Planets Encyclopaedia |publisher=Paris Observatory |url=http://exoplanet.eu/star.php?st=Kepler-31 |accessdate=2011-12-06 |deadurl=yes |archiveurl=https://web.archive.org/web/20120426071816/http://exoplanet.eu/star.php?st=Kepler-31 |archivedate=2012-04-26 |df= }} 4. ^{{cite web |title=Kepler Discoveries |date=2011-12-05 |url=http://kepler.nasa.gov/Mission/discoveries/ }} }}{{Sky|19|28|56.825|+|41|05|09.15}}{{Stars of Cygnus}} 5 : Kepler-27|Cygnus (constellation)|G-type main-sequence stars|Kepler Objects of Interest|Planetary transit variables |
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