Imaginary Picture of Kepler-166 c

Display orbital revolution of Kepler-166 c around the hoststar Kepler-166
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Exoplanet Name : Kepler-166 c
Alternate Name : "2MASS J19323844+4852522 c, K00481.03, KIC 11192998 c, KOI-481 c, KOI-481.03, WISE J193238.42+485252.3 c"
Status : Confirmed
Radius (Rjup / Re): 0.2120 (Rjup) 2.3763 (Rearth)
Mass (Mjup / Me): 0.0186 (Mjup) 5.9007 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1950 (AU) 0.1950 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0938
Orbital Period(Observed/Estimated) 34.26 (Days Obs.) 35.16 (Days Est.)
Surface Gravity (G Earth) 1.0450
Star Radiation at Atmospheric Boundary: 14144.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 486.7 (K)
Blackbody T 0.3(K) 457.1 (K)
Blackbody T 0.7(K) 369.8 (K)
Tidally Locked Blackbody T 0.1(K) 578.8 (K)
Tidally Locked Blackbody T 0.3(K) 543.6 (K)
Size Class: sub-Neptune-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 : Kepler-166
Alternate Name : "2MASS J19323844+4852522, KIC 11192998, KOI-481, WISE J193238.42+485252.3"
Star Distance(LY) : 1967.9
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5175 (K)
Spectral type : G7
UV portion[%]: 6.5
Visible portion[%]: 42.5
IR portion[%]: 51.0
Metalicity : -0.3
Absolute Magnitude: 4.4
Apparent Magnitude: 13.3
Right Ascension(RA) 293.1602
Declination (DEC) 48.8812
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-166+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/Kepler-166%20c/
Kepler-166 c
Kepler-166 c

  • Kepler-166 c is an exoplanet orbiting the star Kepler-166, located about 1967.9 light-years (603.3 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star Kepler-166 has apparent magnitude of 13.3, with absolute magnitude of 4.4.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5175 with its spectral types of G7
  • In this planetary system, the extrasolar planet Kepler-166 c orbits around the star Kepler-166 every 34.3 days with its orbital distance of 0.20 AU ( 29171584.8 km)
  • (Projected orbit of Kepler-166 c around its host star Kepler-166)


  • The Star Kepler-166 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.454 AU ( 67871207.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.627 AU ( 93815745.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.956 AU ( 142954434.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.406 AU ( 210363712.5 km)
  • Radiation at Planetary Boundary of Kepler-166 c : 14144.59 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-166)



  • Kopparapu Recent Venus for Star Kepler-166 distance : 0.487 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-166 distance : 0.616 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-166 distance : 0.595 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-166 distance : 0.653 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-166 distance : 1.109 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-166 distance : 1.170 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-166)



  • Original Kopparapu Recent Venus for Star Kepler-166 distance : 0.482 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-166 distance : 0.634 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-166 distance : 0.638 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-166 distance : 1.128 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-166 distance : 1.173 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-166)



    (Position in Stellar Map of star Kepler-166 and its Exoplanet Kepler-166 c)



    (Zoomed position in Stellar Map of star Kepler-166 and its Exoplanet Kepler-166 c (zoom level 3))

    (Synthetic Spectrum of star Kepler-166*)
    *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