Imaginary Picture of K2-184 b

Display orbital revolution of K2-184 b around the hoststar K2-184
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Exoplanet Name : K2-184 b
Alternate Name : "2MASS J08363360+1427429 b, EPIC 211594205 b, EPIC 211594205.01, TYC 809-394-1 b, WISE J083633.69+142742.8 b"
Status : Confirmed
Radius (Rjup / Re): 0.1380 (Rjup) 1.5468 (Rearth)
Mass (Mjup / Me): 0.0124 (Mjup) 3.9582 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1229 (AU) 0.1229 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0465
Orbital Period(Observed/Estimated) 17.00 (Days Obs.) 16.97 (Days Est.)
Surface Gravity (G Earth) 1.6543
Star Radiation at Atmospheric Boundary: 36675.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 617.6 (K)
Blackbody T 0.3(K) 580.0 (K)
Blackbody T 0.7(K) 469.3 (K)
Tidally Locked Blackbody T 0.1(K) 734.5 (K)
Tidally Locked Blackbody T 0.3(K) 689.8 (K)
Size Class: super-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 : K2-184
Alternate Name : "2MASS J08363360+1427429, EPIC 211594205, TYC 809-394-1, WISE J083633.69+142742.8"
Star Distance(LY) : 247.2
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5220 (K)
Spectral type : K0
UV portion[%]: 5.2
Visible portion[%]: 40.4
IR portion[%]: 54.4
Metalicity : -0.1
Absolute Magnitude: 4.5
Apparent Magnitude: 8.9
Right Ascension(RA) 129.1401
Declination (DEC) 14.4619
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
K2-184 b
K2-184 b

  • K2-184 b is an exoplanet orbiting the star K2-184, located about 247.2 light-years (75.8 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-184 has apparent magnitude of 8.9, with absolute magnitude of 4.5.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5220 with its spectral types of K0
  • In this planetary system, the extrasolar planet K2-184 b orbits around the star K2-184 every 17.0 days with its orbital distance of 0.12 AU ( 18385578.3 km)
  • (Projected orbit of K2-184 b around its host star K2-184)


  • The Star K2-184 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.460 AU ( 68880092.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.636 AU ( 95210288.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.970 AU ( 145079409.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.427 AU ( 213490706.3 km)
  • Radiation at Planetary Boundary of K2-184 b : 36675.18 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-184)



  • Kopparapu Recent Venus for Star K2-184 distance : 0.493 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-184 distance : 0.624 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-184 distance : 0.602 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-184 distance : 0.661 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-184 distance : 1.121 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-184 distance : 1.182 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-184)



  • Original Kopparapu Recent Venus for Star K2-184 distance : 0.489 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-184 distance : 0.642 AU
  • Original Kopparapu Moist Greenhouse for Star K2-184 distance : 0.647 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-184 distance : 1.140 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-184 distance : 1.186 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-184)



    (Position in Stellar Map of star K2-184 and its Exoplanet K2-184 b)



    (Zoomed position in Stellar Map of star K2-184 and its Exoplanet K2-184 b (zoom level 3))

    (Synthetic Spectrum of star K2-184*)
    *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