Imaginary Picture of K2-151 b

Display orbital revolution of K2-151 b around the hoststar K2-151
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Exoplanet Name : K2-151 b
Alternate Name : "2MASS J01171307+0930050 b, EPIC 212006344 A b, EPIC 220621087 B b, EPIC 220621087 b, EPIC 220621087.01, K2-151 B b, WIS
Status : Confirmed
Radius (Rjup / Re): 0.1330 (Rjup) 1.4908 (Rearth)
Mass (Mjup / Me): 0.0131 (Mjup) 4.1610 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0373 (AU) 0.0373 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0105
Orbital Period(Observed/Estimated) 3.84 (Days Obs.) 3.84 (Days Est.)
Surface Gravity (G Earth) 1.8722
Star Radiation at Atmospheric Boundary: 33271.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 602.8 (K)
Blackbody T 0.3(K) 566.1 (K)
Blackbody T 0.7(K) 458.0 (K)
Tidally Locked Blackbody T 0.1(K) 716.8 (K)
Tidally Locked Blackbody T 0.3(K) 673.2 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-151
Alternate Name : "2MASS J01171307+0930050, EPIC 220621087, EPIC 220621087 B, K2-151 B, WISE J011713.12+093004.7"
Star Distance(LY) : 227.0
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3695 (K)
Spectral type : M1.5 V
UV portion[%]: 0.4
Visible portion[%]: 18.2
IR portion[%]: 81.4
Metalicity : -0.2
Absolute Magnitude: 6.7
Apparent Magnitude: 10.9
Right Ascension(RA) 19.3045
Declination (DEC) 9.5014
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=K2-151+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-151 b
K2-151 b

  • K2-151 b is an exoplanet orbiting the star K2-151, located about 227.0 light-years (69.6 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-151 has apparent magnitude of 10.9, with absolute magnitude of 6.7.
  • It is 0.5 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3695 with its spectral types of M1.5 V
  • In this planetary system, the extrasolar planet K2-151 b orbits around the star K2-151 every 3.8 days with its orbital distance of 0.04 AU ( 5580000.6 km)
  • (Projected orbit of K2-151 b around its host star K2-151)


  • The Star K2-151 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.133 AU ( 19911295.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.184 AU ( 27522613.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.280 AU ( 41938372.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.413 AU ( 61714151.8 km)
  • Radiation at Planetary Boundary of K2-151 b : 33271.31 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-151)



  • Kopparapu Recent Venus for Star K2-151 distance : 0.150 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-151 distance : 0.190 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-151 distance : 0.183 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-151 distance : 0.202 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-151 distance : 0.366 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-151 distance : 0.386 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-151)



  • Original Kopparapu Recent Venus for Star K2-151 distance : 0.148 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-151 distance : 0.196 AU
  • Original Kopparapu Moist Greenhouse for Star K2-151 distance : 0.196 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-151 distance : 0.372 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-151 distance : 0.386 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-151)



    (Position in Stellar Map of star K2-151 and its Exoplanet K2-151 b)



    (Zoomed position in Stellar Map of star K2-151 and its Exoplanet K2-151 b (zoom level 3))

    (Synthetic Spectrum of star K2-151*)
    *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