Imaginary Picture of K2-210 b

Display orbital revolution of K2-210 b around the hoststar K2-210
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Exoplanet Name : K2-210 b
Alternate Name : "2MASS J01103382+0134416 b, EPIC 220250254 b, EPIC 220250254.01, TYC 20-536-1 b, WISE J011033.88+013442.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.0730 (Rjup) 0.8183 (Rearth)
Mass (Mjup / Me): 0.0015 (Mjup) 0.4799 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0130 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0016
Orbital Period(Observed/Estimated) 0.57 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 0.7167
Star Radiation at Atmospheric Boundary: 4416585.8 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 2046.0 (K)
Blackbody T 0.3(K) 1921.4 (K)
Blackbody T 0.7(K) 1554.7 (K)
Tidally Locked Blackbody T 0.1(K) 2433.2 (K)
Tidally Locked Blackbody T 0.3(K) 2285.0 (K)
Size Class: 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 : K2-210
Alternate Name : "2MASS J01103382+0134416, EPIC 220250254, TYC 20-536-1, WISE J011033.88+013442.1"
Star Distance(LY) : 581.2
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5396 (K)
Spectral type : G7
UV portion[%]: 6.4
Visible portion[%]: 42.4
IR portion[%]: 51.2
Metalicity : 0.1
Absolute Magnitude: 4.1
Apparent Magnitude: 10.4
Right Ascension(RA) 17.6409
Declination (DEC) 1.5783
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=K2-210&submit=SIMBAD+search
Open Exoplanet Database Link
K2-210 b
K2-210 b

  • K2-210 b is an exoplanet orbiting the star K2-210, located about 581.2 light-years (178.2 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-210 has apparent magnitude of 10.4, with absolute magnitude of 4.1.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5396 with its spectral types of G7
  • In this planetary system, the extrasolar planet K2-210 b orbits around the star K2-210 every 0.6 days with its orbital distance of 0.01 AU ( 1950955.2 km)
  • (Projected orbit of K2-210 b around its host star K2-210)


  • The Star K2-210 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.536 AU ( 80208597.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.741 AU ( 110869242.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.129 AU ( 168940189.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.662 AU ( 248602890.0 km)
  • Radiation at Planetary Boundary of K2-210 b : 4416585.76 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-210)



  • Kopparapu Recent Venus for Star K2-210 distance : 0.568 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-210 distance : 0.719 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-210 distance : 0.695 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-210 distance : 0.762 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-210 distance : 1.285 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-210 distance : 1.356 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-210)



  • Original Kopparapu Recent Venus for Star K2-210 distance : 0.565 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-210 distance : 0.740 AU
  • Original Kopparapu Moist Greenhouse for Star K2-210 distance : 0.748 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-210 distance : 1.307 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-210 distance : 1.360 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-210)



    (Position in Stellar Map of star K2-210 and its Exoplanet K2-210 b)



    (Zoomed position in Stellar Map of star K2-210 and its Exoplanet K2-210 b (zoom level 3))

    (Synthetic Spectrum of star K2-210*)
    *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