Imaginary Picture of K2-244 b

Display orbital revolution of K2-244 b around the hoststar K2-244
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Exoplanet Name : K2-244 b
Alternate Name : "2MASS J12135253-0349547 b, EPIC 201211526 b, EPIC 201211526.01, TYC 4943-726-1 b, WISE J121352.49-034954.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.1560 (Rjup) 1.7486 (Rearth)
Mass (Mjup / Me): 0.0140 (Mjup) 4.4363 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1418 (AU) 0.1418 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0577
Orbital Period(Observed/Estimated) 21.07 (Days Obs.) 21.03 (Days Est.)
Surface Gravity (G Earth) 1.4509
Star Radiation at Atmospheric Boundary: 53617.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 679.2 (K)
Blackbody T 0.3(K) 637.8 (K)
Blackbody T 0.7(K) 516.0 (K)
Tidally Locked Blackbody T 0.1(K) 807.7 (K)
Tidally Locked Blackbody T 0.3(K) 758.5 (K)
Size Class: super-Earth-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 : K2-244
Alternate Name : "2MASS J12135253-0349547, EPIC 201211526, TYC 4943-726-1, WISE J121352.49-034954.7"
Star Distance(LY) : 701.6
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5677 (K)
Spectral type : G5
UV portion[%]: 7.5
Visible portion[%]: 44.3
IR portion[%]: 48.2
Metalicity : -0.3
Absolute Magnitude: 3.9
Apparent Magnitude: 10.6
Right Ascension(RA) 183.4689
Declination (DEC) -3.8319
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=K2-244+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-244 b
K2-244 b

  • K2-244 b is an exoplanet orbiting the star K2-244, located about 701.6 light-years (215.1 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-244 has apparent magnitude of 10.6, with absolute magnitude of 3.9.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5677 with its spectral types of G5
  • In this planetary system, the extrasolar planet K2-244 b orbits around the star K2-244 every 21.1 days with its orbital distance of 0.14 AU ( 21212978.1 km)
  • (Projected orbit of K2-244 b around its host star K2-244)


  • The Star K2-244 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.642 AU ( 96091224.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.888 AU ( 132823184.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.353 AU ( 202393138.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.991 AU ( 297830370.1 km)
  • Radiation at Planetary Boundary of K2-244 b : 53617.13 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-244)



  • Kopparapu Recent Venus for Star K2-244 distance : 0.670 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-244 distance : 0.848 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-244 distance : 0.819 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-244 distance : 0.898 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-244 distance : 1.502 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-244 distance : 1.584 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-244)



  • Original Kopparapu Recent Venus for Star K2-244 distance : 0.669 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-244 distance : 0.872 AU
  • Original Kopparapu Moist Greenhouse for Star K2-244 distance : 0.886 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-244 distance : 1.528 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-244 distance : 1.589 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-244)



    (Position in Stellar Map of star K2-244 and its Exoplanet K2-244 b)



    (Zoomed position in Stellar Map of star K2-244 and its Exoplanet K2-244 b (zoom level 3))

    (Synthetic Spectrum of star K2-244*)
    *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