Imaginary Picture of K2-272 b

Display orbital revolution of K2-272 b around the hoststar K2-272
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Exoplanet Name : K2-272 b
Alternate Name : "2MASS J08502906+1732328 b, EPIC 211816003 b, EPIC 211816003.01, WISE J085029.07+173232.6 b"
Status : Confirmed
Radius (Rjup / Re): 0.2600 (Rjup) 2.9143 (Rearth)
Mass (Mjup / Me): 0.0224 (Mjup) 7.1340 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1081 (AU) 0.1081 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0396
Orbital Period(Observed/Estimated) 14.45 (Days Obs.) 14.42 (Days Est.)
Surface Gravity (G Earth) 0.8400
Star Radiation at Atmospheric Boundary: 59374.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 696.7 (K)
Blackbody T 0.3(K) 654.3 (K)
Blackbody T 0.7(K) 529.4 (K)
Tidally Locked Blackbody T 0.1(K) 828.5 (K)
Tidally Locked Blackbody T 0.3(K) 778.1 (K)
Size Class: sub-Neptune-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 : K2-272
Alternate Name : "2MASS J08502906+1732328, EPIC 211816003, WISE J085029.07+173232.6"
Star Distance(LY) : 1374.5
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5419 (K)
Spectral type : G7
UV portion[%]: 6.5
Visible portion[%]: 42.6
IR portion[%]: 50.9
Metalicity : -0.3
Absolute Magnitude: 4.4
Apparent Magnitude: 12.5
Right Ascension(RA) 132.6211
Declination (DEC) 17.5424
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-272+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-272 b
K2-272 b

  • K2-272 b is an exoplanet orbiting the star K2-272, located about 1374.5 light-years (421.4 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-272 has apparent magnitude of 12.5, with absolute magnitude of 4.4.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5419 with its spectral types of G7
  • In this planetary system, the extrasolar planet K2-272 b orbits around the star K2-272 every 14.5 days with its orbital distance of 0.11 AU ( 16171529.8 km)
  • (Projected orbit of K2-272 b around its host star K2-272)


  • The Star K2-272 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.515 AU ( 77087051.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.712 AU ( 106554450.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.085 AU ( 162365401.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.597 AU ( 238927801.1 km)
  • Radiation at Planetary Boundary of K2-272 b : 59374.51 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-272)



  • Kopparapu Recent Venus for Star K2-272 distance : 0.545 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-272 distance : 0.691 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-272 distance : 0.667 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-272 distance : 0.732 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-272 distance : 1.233 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-272 distance : 1.300 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-272)



  • Original Kopparapu Recent Venus for Star K2-272 distance : 0.543 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-272 distance : 0.711 AU
  • Original Kopparapu Moist Greenhouse for Star K2-272 distance : 0.718 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-272 distance : 1.254 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-272 distance : 1.304 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-272)



    (Position in Stellar Map of star K2-272 and its Exoplanet K2-272 b)



    (Zoomed position in Stellar Map of star K2-272 and its Exoplanet K2-272 b (zoom level 3))

    (Synthetic Spectrum of star K2-272*)
    *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