Imaginary Picture of Kepler-271 d

Display orbital revolution of Kepler-271 d around the hoststar Kepler-271
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Exoplanet Name : Kepler-271 d
Alternate Name : "2MASS J18520071+4417032 d, K01151.03, KIC 8280511 d, KOI-1151 d, KOI-1151.03, WISE J185200.70+441702.9 d"
Status : Confirmed
Radius (Rjup / Re): 0.0590 (Rjup) 0.6613 (Rearth)
Mass (Mjup / Me): 0.0007 (Mjup) 0.2277 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0571 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0144
Orbital Period(Observed/Estimated) 5.25 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.5206
Star Radiation at Atmospheric Boundary: 246951.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 994.9 (K)
Blackbody T 0.3(K) 934.3 (K)
Blackbody T 0.7(K) 756.0 (K)
Tidally Locked Blackbody T 0.1(K) 1183.2 (K)
Tidally Locked Blackbody T 0.3(K) 1111.1 (K)
Size Class: Mars-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : Kepler-271
Alternate Name : "2MASS J18520071+4417032, KIC 8280511, KOI-1151, WISE J185200.70+441702.9"
Star Distance(LY) : 1319.1
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.6 (GY)
Temperature : 5470 (K)
Spectral type : G6
UV portion[%]: 6.7
Visible portion[%]: 43.0
IR portion[%]: 50.2
Metalicity : -0.1
Absolute Magnitude: 4.2
Apparent Magnitude: 12.2
Right Ascension(RA) 283.0030
Declination (DEC) 44.2842
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-271+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-271%20d/
Kepler-271 d
Kepler-271 d
  • Kepler-271 d is an exoplanet orbiting the star Kepler-271, located about 1319.1 light-years (404.4 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star Kepler-271 has apparent magnitude of 12.2, with absolute magnitude of 4.2.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5470 with its spectral types of G6
  • In this planetary system, the extrasolar planet Kepler-271 d orbits around the star Kepler-271 every 5.2 days with its orbital distance of 0.06 AU ( 8538281.9 km)
    • (Projected orbit of Kepler-271 d around its host star Kepler-271)


  • The Star Kepler-271 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.555 AU ( 83005435.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.767 AU ( 114735203.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.169 AU ( 174831058.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.720 AU ( 257271561.6 km)
  • Radiation at Planetary Boundary of Kepler-271 d : 246951.40 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-271)



  • Kopparapu Recent Venus for Star Kepler-271 distance : 0.586 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-271 distance : 0.741 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-271 distance : 0.716 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-271 distance : 0.785 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-271 distance : 1.321 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-271 distance : 1.394 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-271)



  • Original Kopparapu Recent Venus for Star Kepler-271 distance : 0.583 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-271 distance : 0.763 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-271 distance : 0.771 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-271 distance : 1.344 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-271 distance : 1.398 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-271)



    (Position in Stellar Map of star Kepler-271 and its Exoplanet Kepler-271 d)



    (Zoomed position in Stellar Map of star Kepler-271 and its Exoplanet Kepler-271 d (zoom level 3))

    (Synthetic Spectrum of star Kepler-271*)
    *Yamashiki YA et al. 2019 ApJ 881 114
    MUSCLES Paper I - France et al. 2016 ApJ 820 89
    MUSCLES Paper II- Youngblood et al. 2016 ApJ 824 101
    MUSCLES Paper III- Loyd et al. 2016 ApJ 824 102