Imaginary Picture of K2-53 b

Display orbital revolution of K2-53 b around the hoststar K2-53
/
Exoplanet Name : K2-53 b
Alternate Name : EPIC 204890128.01
Status : Confirmed
Radius (Rjup / Re): 0.2320 (Rjup) 2.6005 (Rearth)
Mass (Mjup / Me): 0.0289 (Mjup) 9.1884 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0980 (AU) 0.0980 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0334
Orbital Period(Observed/Estimated) 12.21 (Days Obs.) 12.15 (Days Est.)
Surface Gravity (G Earth) 1.3587
Star Radiation at Atmospheric Boundary: 64277.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 710.7 (K)
Blackbody T 0.3(K) 667.4 (K)
Blackbody T 0.7(K) 540.0 (K)
Tidally Locked Blackbody T 0.1(K) 845.1 (K)
Tidally Locked Blackbody T 0.3(K) 793.6 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-53
Alternate Name : "2MASS J16163403-2024019, EPIC 204890128, WISE J161634.05-202402.0"
Star Distance(LY) : 449.1
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5263 (K)
Spectral type : K0
UV portion[%]: 5.5
Visible portion[%]: 41.0
IR portion[%]: 53.5
Metalicity : -0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 10.3
Right Ascension(RA) 244.1418
Declination (DEC) -20.4005
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=K2-53+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-53 b
K2-53 b

  • K2-53 b is an exoplanet orbiting the star K2-53, located about 449.1 light-years (137.7 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star K2-53 has apparent magnitude of 10.3, with absolute magnitude of 4.6.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5263 with its spectral types of K0
  • In this planetary system, the extrasolar planet K2-53 b orbits around the star K2-53 every 12.2 days with its orbital distance of 0.10 AU ( 14660591.3 km)
  • (Projected orbit of K2-53 b around its host star K2-53)


  • The Star K2-53 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.486 AU ( 72712633.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.672 AU ( 100507860.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.024 AU ( 153151737.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.507 AU ( 225369491.2 km)
  • Radiation at Planetary Boundary of K2-53 b : 64277.09 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-53)



  • Kopparapu Recent Venus for Star K2-53 distance : 0.519 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-53 distance : 0.657 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-53 distance : 0.635 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-53 distance : 0.696 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-53 distance : 1.179 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-53 distance : 1.244 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-53)



  • Original Kopparapu Recent Venus for Star K2-53 distance : 0.515 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-53 distance : 0.676 AU
  • Original Kopparapu Moist Greenhouse for Star K2-53 distance : 0.681 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-53 distance : 1.199 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-53 distance : 1.247 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-53)



    (Position in Stellar Map of star K2-53 and its Exoplanet K2-53 b)



    (Zoomed position in Stellar Map of star K2-53 and its Exoplanet K2-53 b (zoom level 3))

    (Synthetic Spectrum of star K2-53*)
    *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