Imaginary Picture of K2-32 Ac

Display orbital revolution of K2-32 Ac around the hoststar K2-32 A
/
Exoplanet Name : K2-32 Ac
Alternate Name : "K2-32 c, 2MASS J16494226-1932340 c, EPIC 205071984 A c, EPIC 205071984 c, EPIC 205071984.03, WISE J164942.25-193234.6 c
Status : Confirmed
Radius (Rjup / Re): 0.2440 (Rjup) 2.7350 (Rearth)
Mass (Mjup / Me): 0.0255 (Mjup) 8.1074 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1399 (AU) 0.1399 (AU Est.)
Eccentricity : 0.0490
Orbital Period(Yrs) 0.0566
Orbital Period(Observed/Estimated) 20.66 (Days Obs.) 20.61 (Days Est.)
Surface Gravity (G Earth) 1.0839
Star Radiation at Atmospheric Boundary: 35281.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 611.7 (K)
Blackbody T 0.3(K) 574.4 (K)
Blackbody T 0.7(K) 464.8 (K)
Tidally Locked Blackbody T 0.1(K) 727.4 (K)
Tidally Locked Blackbody T 0.3(K) 683.1 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-32 A
Alternate Name : "EPIC 205071984, 2MASS J16494226-1932340, EPIC 205071984 A, WISE J164942.25-193234.6, TIC 437444661"
Star Distance(LY) : 516.6
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5315 (K)
Spectral type : G9V
UV portion[%]: 5.9
Visible portion[%]: 41.6
IR portion[%]: 52.5
Metalicity : 0.0
Absolute Magnitude: 6.3
Apparent Magnitude: 12.3
Right Ascension(RA) 252.4261
Declination (DEC) -19.5428
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
K2-32 Ac
K2-32 Ac

  • K2-32 Ac is an exoplanet orbiting the star K2-32 A, located about 516.6 light-years (158.4 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star K2-32 A has apparent magnitude of 12.3, with absolute magnitude of 6.3.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5315 with its spectral types of G9V
  • In this planetary system, the extrasolar planet K2-32 Ac orbits around the star K2-32 A every 20.7 days with its orbital distance of 0.14 AU ( 20928742.1 km)
  • (Projected orbit of K2-32 Ac around its host star K2-32 A)


  • The Star K2-32 A 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.514 AU ( 76903115.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.711 AU ( 106300203.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.083 AU ( 161977985.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.593 AU ( 238357701.6 km)
  • Radiation at Planetary Boundary of K2-32 Ac : 35281.01 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-32 A)



  • Kopparapu Recent Venus for Star K2-32 A distance : 0.547 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-32 A distance : 0.693 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-32 A distance : 0.669 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-32 A distance : 0.734 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-32 A distance : 1.241 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-32 A distance : 1.309 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-32 A)



  • Original Kopparapu Recent Venus for Star K2-32 A distance : 0.544 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-32 A distance : 0.713 AU
  • Original Kopparapu Moist Greenhouse for Star K2-32 A distance : 0.719 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-32 A distance : 1.262 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-32 A distance : 1.313 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-32 A)



    (Position in Stellar Map of star K2-32 A and its Exoplanet K2-32 Ac)



    (Zoomed position in Stellar Map of star K2-32 A and its Exoplanet K2-32 Ac (zoom level 3))

    (Synthetic Spectrum of star K2-32 A*)
    *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