Imaginary Picture of EPIC 212499991 b

Display orbital revolution of EPIC 212499991 b around the hoststar EPIC 212499991
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Exoplanet Name : EPIC 212499991 b
Alternate Name : "2MASS J13295729-1244051 b, EPIC 212499991.02, K2-306 b, WISE J132957.29-124405.2 b"
Status : Confirmed
Radius (Rjup / Re): 0.1430 (Rjup) 1.6029 (Rearth)
Mass (Mjup / Me): 0.0129 (Mjup) 4.0914 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.2025 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0955
Orbital Period(Observed/Estimated) 34.88 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.5925
Star Radiation at Atmospheric Boundary: 2613.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 319.1 (K)
Blackbody T 0.3(K) 299.7 (K)
Blackbody T 0.7(K) 242.5 (K)
Tidally Locked Blackbody T 0.1(K) 379.5 (K)
Tidally Locked Blackbody T 0.3(K) 356.4 (K)
Size Class: super-Earth-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Habitable
Habitability by Kopparapu: Not habitable
Star Name : EPIC 212499991
Alternate Name : "2MASS J13295729-1244051, K2-306, WISE J132957.29-124405.2"
Star Distance(LY) : 931.5
Stellar Radius(Rsun) : 0.9 (Rsun Estimated)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3300 (K)
Spectral type : M9
UV portion[%]: 0.2
Visible portion[%]: 11.2
IR portion[%]: 88.6
Metalicity : 0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 11.9
Right Ascension(RA) 202.4888
Declination (DEC) -12.7347
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
EPIC 212499991 b
EPIC 212499991 b

  • EPIC 212499991 b is an exoplanet orbiting the star EPIC 212499991, located about 931.5 light-years (285.6 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star EPIC 212499991 has apparent magnitude of 11.9, with absolute magnitude of 4.6.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
  • In this planetary system, the extrasolar planet EPIC 212499991 b orbits around the star EPIC 212499991 every 34.9 days with its orbital distance of 0.20 AU ( 30290390.9 km)
  • (Projected orbit of EPIC 212499991 b around its host star EPIC 212499991)


  • The Star EPIC 212499991 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.202 AU ( 30290284.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.280 AU ( 41869088.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.426 AU ( 63799225.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.628 AU ( 93883355.0 km)
  • Radiation at Planetary Boundary of EPIC 212499991 b : 2612.98 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star EPIC 212499991)



  • Kopparapu Recent Venus for Star EPIC 212499991 distance : 0.229 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star EPIC 212499991 distance : 0.290 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star EPIC 212499991 distance : 0.280 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star EPIC 212499991 distance : 0.308 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 212499991 distance : 0.570 AU
  • Kopparapu Outer Boundary for Early Mars for Star EPIC 212499991 distance : 0.602 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star EPIC 212499991)



  • Original Kopparapu Recent Venus for Star EPIC 212499991 distance : 0.228 AU
  • Original Kopparapu Runaway Greenhouse for Star EPIC 212499991 distance : 0.301 AU
  • Original Kopparapu Moist Greenhouse for Star EPIC 212499991 distance : 0.301 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star EPIC 212499991 distance : 0.579 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star EPIC 212499991 distance : 0.602 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star EPIC 212499991)



    (Position in Stellar Map of star EPIC 212499991 and its Exoplanet EPIC 212499991 b)



    (Zoomed position in Stellar Map of star EPIC 212499991 and its Exoplanet EPIC 212499991 b (zoom level 3))

    (Synthetic Spectrum of star EPIC 212499991*)
    *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