Imaginary Picture of 2M J2126-81 b

Display orbital revolution of 2M J2126-81 b around the hoststar TYC 9486-927-1
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Exoplanet Name : 2M J2126-81 b
Alternate Name :
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 13.3000 (Mjup) 4228.5754 (Mearth)
Semi Major Axis / Orbital Distance Calculated 6900.0000 (AU) 6900.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 331004474.85 (Days Est.)
Surface Gravity (G Earth) 40.8368
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 1800.0 (K)
Blackbody T 0.1(K) 1.3 (K)
Blackbody T 0.3(K) 1.2 (K)
Blackbody T 0.7(K) 1.0 (K)
Tidally Locked Blackbody T 0.1(K) 1.5 (K)
Tidally Locked Blackbody T 0.3(K) 1.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection : Spectrum
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : TYC 9486-927-1
Alternate Name :
Star Distance(LY) : 80.7
Stellar Radius(Rsun) : 0.4 (Rsun Estimated)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3600 (K)
Spectral type : M2
UV portion[%]: 0.4
Visible portion[%]: 16.6
IR portion[%]: 83.0
Metalicity : 0.0
Absolute Magnitude: 7.0
Apparent Magnitude: 9.0
Right Ascension(RA) 321.3667
Declination (DEC) -81.6411
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title 0
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link 0
2M J2126-81 b
2M J2126-81 b

  • 2M J2126-81 b is an exoplanet orbiting the star TYC 9486-927-1, located about 80.7 light-years (24.8 pc) away from Solar System. Its discovery was publicly announced on 2016.
  • The host star TYC 9486-927-1 has apparent magnitude of 9.0, with absolute magnitude of 7.0.
  • It is 0.4 times more massive and 0.4 times bigger compared with our Sun. The surface temperature is 3600 with its spectral types of M2
  • (Projected orbit of 2M J2126-81 b around its host star TYC 9486-927-1)


  • The Star TYC 9486-927-1 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.112 AU ( 16774734.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.155 AU ( 23187066.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.236 AU ( 35331958.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.348 AU ( 51992525.0 km)
  • Radiation at Planetary Boundary of 2M J2126-81 b : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TYC 9486-927-1)



  • Kopparapu Recent Venus for Star TYC 9486-927-1 distance : 0.127 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TYC 9486-927-1 distance : 0.160 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TYC 9486-927-1 distance : 0.155 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TYC 9486-927-1 distance : 0.170 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TYC 9486-927-1 distance : 0.310 AU
  • Kopparapu Outer Boundary for Early Mars for Star TYC 9486-927-1 distance : 0.327 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TYC 9486-927-1)



  • Original Kopparapu Recent Venus for Star TYC 9486-927-1 distance : 0.125 AU
  • Original Kopparapu Runaway Greenhouse for Star TYC 9486-927-1 distance : 0.166 AU
  • Original Kopparapu Moist Greenhouse for Star TYC 9486-927-1 distance : 0.166 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TYC 9486-927-1 distance : 0.315 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TYC 9486-927-1 distance : 0.328 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TYC 9486-927-1)



    (Position in Stellar Map of star TYC 9486-927-1 and its Exoplanet 2M J2126-81 b)



    (Zoomed position in Stellar Map of star TYC 9486-927-1 and its Exoplanet 2M J2126-81 b (zoom level 3))

    (Synthetic Spectrum of star TYC 9486-927-1*)
    *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