Imaginary Picture of K2-288 Bb

Display orbital revolution of K2-288 Bb around the hoststar K2-288 B
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Exoplanet Name : K2-288 Bb
Alternate Name : "EPIC 210693462 b, EPIC 210693462.01, LP 413-32 Bb"
Status : Confirmed
Radius (Rjup / Re): 0.1520 (Rjup) 1.7038 (Rearth)
Mass (Mjup / Me): 0.0136 (Mjup) 4.3304 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1640 (AU) 0.1640 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0859
Orbital Period(Observed/Estimated) 31.39 (Days Obs.) 42.23 (Days Est.)
Surface Gravity (G Earth) 1.4918
Star Radiation at Atmospheric Boundary: 581.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 219.2 (K)
Blackbody T 0.3(K) 205.8 (K)
Blackbody T 0.7(K) 166.5 (K)
Tidally Locked Blackbody T 0.1(K) 260.7 (K)
Tidally Locked Blackbody T 0.3(K) 244.8 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Habitable
Star Name : K2-288 B
Alternate Name : "EPIC 210693462, LP 413-32 B"
Star Distance(LY) : 214.0
Stellar Radius(Rsun) : 0.3 (Rsun Measured)
Stellar Mass(Msun) : 0.3 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 1.0 (GY)
Temperature : 3341 (K)
Spectral type : M3V
UV portion[%]: 0.2
Visible portion[%]: 11.9
IR portion[%]: 87.8
Metalicity : -0.2
Absolute Magnitude: 17.9
Apparent Magnitude: 22.0
Right Ascension(RA) 55.4434
Declination (DEC) 18.2688
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
K2-288 Bb
K2-288 Bb

  • K2-288 Bb is an exoplanet orbiting the star K2-288 B, located about 214.0 light-years (65.6 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-288 B has apparent magnitude of 22.0, with absolute magnitude of 17.9.
  • It is 0.3 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3341 with its spectral types of M3V
  • In this planetary system, the extrasolar planet K2-288 Bb orbits around the star K2-288 B every 31.4 days with its orbital distance of 0.16 AU ( 24534050.8 km)
  • (Projected orbit of K2-288 Bb around its host star K2-288 B)


  • The Star K2-288 B 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.077 AU ( 11576067.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.107 AU ( 16001150.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.163 AU ( 24382211.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.240 AU ( 35879492.8 km)
  • Radiation at Planetary Boundary of K2-288 Bb : 581.73 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-288 B)



  • Kopparapu Recent Venus for Star K2-288 B distance : 0.088 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-288 B distance : 0.111 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-288 B distance : 0.107 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-288 B distance : 0.118 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-288 B distance : 0.217 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-288 B distance : 0.229 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-288 B)



  • Original Kopparapu Recent Venus for Star K2-288 B distance : 0.087 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-288 B distance : 0.115 AU
  • Original Kopparapu Moist Greenhouse for Star K2-288 B distance : 0.115 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-288 B distance : 0.221 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-288 B distance : 0.230 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-288 B)



    (Position in Stellar Map of star K2-288 B and its Exoplanet K2-288 Bb)



    (Zoomed position in Stellar Map of star K2-288 B and its Exoplanet K2-288 Bb (zoom level 3))

    (Synthetic Spectrum of star K2-288 B*)
    *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