Imaginary Picture of ROXs 42B (AB) b

Display orbital revolution of ROXs 42B (AB) b around the hoststar ROXs 42B (AB)
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Exoplanet Name : ROXs 42B (AB) b
Alternate Name : ROXs 42B b
Status : Confirmed
Radius (Rjup / Re): 2.5000 (Rjup) 28.0225 (Rearth)
Mass (Mjup / Me): 9.0000 (Mjup) 2861.4420 (Mearth)
Semi Major Axis / Orbital Distance Calculated 140.0000 (AU) 140.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 781100.03 (Days Est.)
Surface Gravity (G Earth) 3.6439
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 1975.0 (K)
Blackbody T 0.1(K) 6.4 (K)
Blackbody T 0.3(K) 6.0 (K)
Blackbody T 0.7(K) 4.9 (K)
Tidally Locked Blackbody T 0.1(K) 7.6 (K)
Tidally Locked Blackbody T 0.3(K) 7.2 (K)
Size Class: Sub-Star-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 : ROXs 42B (AB)
Alternate Name :
Star Distance(LY) : 440.3
Stellar Radius(Rsun) : 0.5 (Rsun Estimated)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 2200 (K)
Spectral type : M0 D
UV portion[%]: 0.1
Visible portion[%]: 4.9
IR portion[%]: 95.0
Metalicity : 0.0
Absolute Magnitude: 8.6
Apparent Magnitude: 14.3
Right Ascension(RA) 247.8126
Declination (DEC) -24.5456
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Ratzka,.; K_hler,.; Leinert,h."
Discovery Paper - Title A multiplicity survey of the Ophiuchi molecular clouds
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=ROXs+42B+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/ROXs%2042%20B%20b/
ROXs 42B (AB) b
ROXs 42B (AB) b

  • ROXs 42B (AB) b is an exoplanet orbiting the star ROXs 42B (AB), located about 440.3 light-years (135.0 pc) away from Solar System. Its discovery was publicly announced on 2013.
  • The host star ROXs 42B (AB) has apparent magnitude of 14.3, with absolute magnitude of 8.6.
  • It is 0.6 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 2200 with its spectral types of M0 D
  • (Projected orbit of ROXs 42B (AB) b around its host star ROXs 42B (AB))


  • The Star ROXs 42B (AB) 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.057 AU ( 8466701.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.078 AU ( 11703194.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.119 AU ( 17833077.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.175 AU ( 26242155.1 km)
  • Radiation at Planetary Boundary of ROXs 42B (AB) b : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star ROXs 42B (AB))



  • Kopparapu Recent Venus for Star ROXs 42B (AB) distance : 0.065 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star ROXs 42B (AB) distance : 0.082 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star ROXs 42B (AB) distance : 0.080 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star ROXs 42B (AB) distance : 0.088 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star ROXs 42B (AB) distance : 0.170 AU
  • Kopparapu Outer Boundary for Early Mars for Star ROXs 42B (AB) distance : 0.179 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star ROXs 42B (AB))



  • Original Kopparapu Recent Venus for Star ROXs 42B (AB) distance : 0.065 AU
  • Original Kopparapu Runaway Greenhouse for Star ROXs 42B (AB) distance : 0.086 AU
  • Original Kopparapu Moist Greenhouse for Star ROXs 42B (AB) distance : 0.086 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star ROXs 42B (AB) distance : 0.173 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star ROXs 42B (AB) distance : 0.180 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star ROXs 42B (AB))



    (Position in Stellar Map of star ROXs 42B (AB) and its Exoplanet ROXs 42B (AB) b)



    (Zoomed position in Stellar Map of star ROXs 42B (AB) and its Exoplanet ROXs 42B (AB) b (zoom level 3))

    (Synthetic Spectrum of star ROXs 42B (AB)*)
    *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