Imaginary Picture of YZ Cet c
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Exoplanet Name : YZ Cet c
Alternate Name :
Radius (Rjup / Re): 0.0000 (Rjup) 0.0000 (Rearth)
Mass (Mjup / Me): 0.0000 (Mjup) 0.0000 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0216 (AU) 0.0216 (AU Est.)
Eccentricity : 0.0400
Orbital Period(Yrs) 0.0084
Orbital Period(Observed/Estimated) 3.06 (Days Obs.) 3.21 (Days Est.)
Star Radiation at Atmospheric Boundary: 6494.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 400.7 (K)
Blackbody T 0.3(K) 376.3 (K)
Blackbody T 0.7(K) 304.4 (K)
Tidally Locked Blackbody T 0.1(K) 476.5 (K)
Tidally Locked Blackbody T 0.3(K) 447.5 (K)
Size Class: Asteroid-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : YZ Cet
Alternate Name :
Star Distance(LY) : 11.7
Stellar Radius(Rsun) : 0.2 (Rsun Measured)
Stellar Mass(Msun) : 0.1 (Msun Measured) 0.1 (Msun Estimated)
Star Age : 4.0 (GY)
Temperature : 3056 (K)
Spectral type : M4.5
Metalicity : -0.3
Absolute Magnitude: 14.3
Apparent Magnitude: 12.1
Right Ascension(RA) 18.1277
Declination (DEC) -16.9989
Hubble Space Telescope Guide Star Catalog (GSC) ID 05851-01939
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=YZ+Cet+&submit=SIMBAD+search
Open Exoplanet Database Link
YZ Cet c
YZ Cet c

  • YZ Cet c is an exoplanet orbiting the star YZ Cet, located about 11.7 light-years ( 3.6 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star YZ Cet has apparent magnitude of 12.1, with absolute magnitude of 14.3.
  • It is 0.1 times more massive and 0.2 times bigger compared with our Sun. The surface temperature is 3056 with its spectral types of M4.5
  • In this planetary system, the extrasolar planet YZ Cet c orbits around the star YZ Cet every 3.1 days with its orbital distance of 0.02 AU ( 3225330.1 km)
  • (Projected orbit of YZ Cet c around its host star YZ Cet)


  • The Star YZ Cet 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.034 AU ( 5084802.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.047 AU ( 7028526.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.072 AU ( 10709918.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.105 AU ( 15760113.7 km)
  • Radiation at Planetary Boundary of YZ Cet c : 6494.40 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star YZ Cet)



  • Kopparapu Recent Venus for Star YZ Cet distance : 0.039 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star YZ Cet distance : 0.049 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star YZ Cet distance : 0.047 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star YZ Cet distance : 0.052 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star YZ Cet distance : 0.097 AU
  • Kopparapu Outer Boundary for Early Mars for Star YZ Cet distance : 0.102 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star YZ Cet)



  • Original Kopparapu Recent Venus for Star YZ Cet distance : 0.038 AU
  • Original Kopparapu Runaway Greenhouse for Star YZ Cet distance : 0.051 AU
  • Original Kopparapu Moist Greenhouse for Star YZ Cet distance : 0.051 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star YZ Cet distance : 0.099 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star YZ Cet distance : 0.103 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star YZ Cet)



    (Position in Stellar Map of star YZ Cet and its Exoplanet YZ Cet c)



    (Zoomed position in Stellar Map of star YZ Cet and its Exoplanet YZ Cet c (zoom level 3))