Imaginary Picture of 2MASS J155947+440359 b

Display orbital revolution of 2MASS J155947+440359 b around the hoststar 2MASS J155947+440359
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Exoplanet Name : 2MASS J155947+440359 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 43.0000 (Mjup) 13671.3340 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1101.2300 (AU) 1101.2300 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 13367792.53 (Days Est.)
Surface Gravity (G Earth) 132.0286
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 3.5 (K)
Blackbody T 0.3(K) 3.3 (K)
Blackbody T 0.7(K) 2.7 (K)
Tidally Locked Blackbody T 0.1(K) 4.2 (K)
Tidally Locked Blackbody T 0.3(K) 4.0 (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 : 2MASS J155947+440359
Alternate Name :
Star Distance(LY) : 146.0
Stellar Radius(Rsun) : 0.5 (Rsun Estimated)
Stellar Mass(Msun) : 1.0 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3600 (K)
Spectral type : M2.0V
UV portion[%]: 0.3
Visible portion[%]: 12.2
IR portion[%]: 87.6
Metalicity : 0.0
Absolute Magnitude: 8.5
Apparent Magnitude: 11.8
Right Ascension(RA) 239.9458
Declination (DEC) 44.0667
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
2MASS J155947+440359 b
2MASS J155947+440359 b

  • 2MASS J155947+440359 b is an exoplanet orbiting the star 2MASS J155947+440359, located about 146.0 light-years (44.8 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star 2MASS J155947+440359 has apparent magnitude of 11.8, with absolute magnitude of 8.5.
  • It is 1.0 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3600 with its spectral types of M2.0V
  • (Projected orbit of 2MASS J155947+440359 b around its host star 2MASS J155947+440359)


  • The Star 2MASS J155947+440359 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.135 AU ( 20241710.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.187 AU ( 27979333.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.285 AU ( 42634312.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.419 AU ( 62738259.0 km)
  • Radiation at Planetary Boundary of 2MASS J155947+440359 b : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star 2MASS J155947+440359)



  • Kopparapu Recent Venus for Star 2MASS J155947+440359 distance : 0.153 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star 2MASS J155947+440359 distance : 0.193 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star 2MASS J155947+440359 distance : 0.187 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star 2MASS J155947+440359 distance : 0.205 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star 2MASS J155947+440359 distance : 0.374 AU
  • Kopparapu Outer Boundary for Early Mars for Star 2MASS J155947+440359 distance : 0.395 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star 2MASS J155947+440359)



  • Original Kopparapu Recent Venus for Star 2MASS J155947+440359 distance : 0.151 AU
  • Original Kopparapu Runaway Greenhouse for Star 2MASS J155947+440359 distance : 0.200 AU
  • Original Kopparapu Moist Greenhouse for Star 2MASS J155947+440359 distance : 0.200 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star 2MASS J155947+440359 distance : 0.380 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star 2MASS J155947+440359 distance : 0.395 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star 2MASS J155947+440359)



    (Position in Stellar Map of star 2MASS J155947+440359 and its Exoplanet 2MASS J155947+440359 b)



    (Zoomed position in Stellar Map of star 2MASS J155947+440359 and its Exoplanet 2MASS J155947+440359 b (zoom level 3))

    (Synthetic Spectrum of star 2MASS J155947+440359*)
    *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