Imaginary Picture of NSC J1239-0054 b

Display orbital revolution of NSC J1239-0054 b around the hoststar NSC J1239-0054
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Exoplanet Name : NSC J1239-0054 b
Alternate Name : NSC J123900.73-005433.72 b
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 55.0000 (Mjup) 17486.5900 (Mearth)
Semi Major Axis / Orbital Distance Calculated 377.0620 (AU) 377.0620 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 5675875.85 (Days Est.)
Surface Gravity (G Earth) 168.8738
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 3.9 (K)
Blackbody T 0.3(K) 3.7 (K)
Blackbody T 0.7(K) 3.0 (K)
Tidally Locked Blackbody T 0.1(K) 4.7 (K)
Tidally Locked Blackbody T 0.3(K) 4.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : NSC J1239-0054
Alternate Name : NSC J123900.73-005433.72
Star Distance(LY) : 139.5
Stellar Radius(Rsun) : 0.3 (Rsun Measured)
Stellar Mass(Msun) : 0.2 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3245 (K)
Spectral type : M4V
UV portion[%]: 0.3
Visible portion[%]: 7.6
IR portion[%]: 92.0
Metalicity : 0.0
Absolute Magnitude: 18.8
Apparent Magnitude: 22.0
Right Ascension(RA) 189.7530
Declination (DEC) -0.9094
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
NSC J1239-0054 b
NSC J1239-0054 b

  • NSC J1239-0054 b is an exoplanet orbiting the star NSC J1239-0054, located about 139.5 light-years (42.8 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star NSC J1239-0054 has apparent magnitude of 22.0, with absolute magnitude of 18.8.
  • It is 0.2 times more massive and 0.3 times bigger compared with our Sun. The surface temperature is 3245 with its spectral types of M4V
  • (Projected orbit of NSC J1239-0054 b around its host star NSC J1239-0054)


  • The Star NSC J1239-0054 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.057 AU ( 8565668.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.079 AU ( 11839991.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.121 AU ( 18041527.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.177 AU ( 26548897.4 km)
  • Radiation at Planetary Boundary of NSC J1239-0054 b : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NSC J1239-0054)



  • Kopparapu Recent Venus for Star NSC J1239-0054 distance : 0.065 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star NSC J1239-0054 distance : 0.082 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star NSC J1239-0054 distance : 0.079 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star NSC J1239-0054 distance : 0.087 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star NSC J1239-0054 distance : 0.162 AU
  • Kopparapu Outer Boundary for Early Mars for Star NSC J1239-0054 distance : 0.171 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NSC J1239-0054)



  • Original Kopparapu Recent Venus for Star NSC J1239-0054 distance : 0.064 AU
  • Original Kopparapu Runaway Greenhouse for Star NSC J1239-0054 distance : 0.085 AU
  • Original Kopparapu Moist Greenhouse for Star NSC J1239-0054 distance : 0.085 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NSC J1239-0054 distance : 0.164 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NSC J1239-0054 distance : 0.171 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star NSC J1239-0054)



    (Position in Stellar Map of star NSC J1239-0054 and its Exoplanet NSC J1239-0054 b)



    (Zoomed position in Stellar Map of star NSC J1239-0054 and its Exoplanet NSC J1239-0054 b (zoom level 3))

    (Synthetic Spectrum of star NSC J1239-0054*)
    *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