Imaginary Picture of K2-176 b

Display orbital revolution of K2-176 b around the hoststar K2-176
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Exoplanet Name : K2-176 b
Alternate Name : "2MASS J03530460+1754255 b, EPIC 210667381 b, EPIC 210667381.01, WISE J035304.59+175425.1 b"
Status : Confirmed
Radius (Rjup / Re): 0.1330 (Rjup) 1.4908 (Rearth)
Mass (Mjup / Me): 0.0131 (Mjup) 4.1610 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0585 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0146
Orbital Period(Observed/Estimated) 5.33 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.8722
Star Radiation at Atmospheric Boundary: 230119.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 977.5 (K)
Blackbody T 0.3(K) 918.0 (K)
Blackbody T 0.7(K) 742.8 (K)
Tidally Locked Blackbody T 0.1(K) 1162.5 (K)
Tidally Locked Blackbody T 0.3(K) 1091.7 (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 : K2-176
Alternate Name : "2MASS J03530460+1754255, EPIC 210667381, WISE J035304.59+175425.1"
Star Distance(LY) : 812.2
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5428 (K)
Spectral type : G7
UV portion[%]: 6.5
Visible portion[%]: 42.7
IR portion[%]: 50.8
Metalicity : 0.1
Absolute Magnitude: 4.2
Apparent Magnitude: 11.2
Right Ascension(RA) 58.2692
Declination (DEC) 17.9071
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
K2-176 b
K2-176 b

  • K2-176 b is an exoplanet orbiting the star K2-176, located about 812.2 light-years (249.0 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-176 has apparent magnitude of 11.2, with absolute magnitude of 4.2.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5428 with its spectral types of G7
  • In this planetary system, the extrasolar planet K2-176 b orbits around the star K2-176 every 5.3 days with its orbital distance of 0.06 AU ( 8750419.6 km)
  • (Projected orbit of K2-176 b around its host star K2-176)


  • The Star K2-176 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.549 AU ( 82117598.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.759 AU ( 113507981.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.156 AU ( 172961044.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.701 AU ( 254519753.8 km)
  • Radiation at Planetary Boundary of K2-176 b : 230119.88 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-176)



  • Kopparapu Recent Venus for Star K2-176 distance : 0.581 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-176 distance : 0.735 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-176 distance : 0.710 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-176 distance : 0.779 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-176 distance : 1.312 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-176 distance : 1.384 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-176)



  • Original Kopparapu Recent Venus for Star K2-176 distance : 0.578 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-176 distance : 0.757 AU
  • Original Kopparapu Moist Greenhouse for Star K2-176 distance : 0.764 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-176 distance : 1.335 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-176 distance : 1.388 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-176)



    (Position in Stellar Map of star K2-176 and its Exoplanet K2-176 b)



    (Zoomed position in Stellar Map of star K2-176 and its Exoplanet K2-176 b (zoom level 3))

    (Synthetic Spectrum of star K2-176*)
    *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