Imaginary Picture of VHS 1256-1257 b

Display orbital revolution of VHS 1256-1257 b around the hoststar VHS 1256-1257
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Exoplanet Name : VHS 1256-1257 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 19.0000 (Mjup) 6040.8220 (Mearth)
Semi Major Axis / Orbital Distance Calculated 102.0000 (AU) 102.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 1392608.53 (Days Est.)
Surface Gravity (G Earth) 58.3382
Star Radiation at Atmospheric Boundary: 0.0 (W/m2)
Measured Temperature (K) 1240.0 (K)
Blackbody T 0.1(K) 3.3 (K)
Blackbody T 0.3(K) 3.1 (K)
Blackbody T 0.7(K) 2.5 (K)
Tidally Locked Blackbody T 0.1(K) 3.9 (K)
Tidally Locked Blackbody T 0.3(K) 3.7 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Imaging
Mass Detection : Astrometry
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : VHS 1256-1257
Alternate Name :
Star Distance(LY) : 41.4
Stellar Radius(Rsun) : 0.1 (Rsun Estimated)
Stellar Mass(Msun) : 0.1 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.2 (GY)
Temperature : 2620 (K)
Spectral type : M7.5
UV portion[%]: 0.1
Visible portion[%]: 4.9
IR portion[%]: 95.0
Metalicity : 0.0
Absolute Magnitude: 17.3
Apparent Magnitude: 17.8
Right Ascension(RA) 194.0083
Declination (DEC) -12.9567
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Gauza,artosz; B_jar,ictor..; P_rez-Garrido,ntonio; Rosaapaterosorio,aria; Lodieu,icolas; Rebolo,afael; Pall_,nric; Nowak,rzegorz"
Discovery Paper - Title Discovery of a Young Planetary Mass Companion to the Nearby M Dwarf VHS J125601.92-125723.9
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/VHS%201256-1257%20b/
VHS 1256-1257 b
VHS 1256-1257 b

  • VHS 1256-1257 b is an exoplanet orbiting the star VHS 1256-1257 , located about 41.4 light-years (12.7 pc) away from Solar System. Its discovery was publicly announced on 2015.
  • The host star VHS 1256-1257 has apparent magnitude of 17.8, with absolute magnitude of 17.3.
  • It is 0.1 times more massive and 0.1 times bigger compared with our Sun. The surface temperature is 2620 with its spectral types of M7.5
  • (Projected orbit of VHS 1256-1257 b around its host star VHS 1256-1257 )


  • The Star VHS 1256-1257 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.011 AU ( 1623990.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.015 AU ( 2244779.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.023 AU ( 3420547.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.034 AU ( 5033485.3 km)
  • Radiation at Planetary Boundary of VHS 1256-1257 b : 0.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star VHS 1256-1257 )



  • Kopparapu Recent Venus for Star VHS 1256-1257 distance : 0.012 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star VHS 1256-1257 distance : 0.016 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star VHS 1256-1257 distance : 0.015 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star VHS 1256-1257 distance : 0.017 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star VHS 1256-1257 distance : 0.032 AU
  • Kopparapu Outer Boundary for Early Mars for Star VHS 1256-1257 distance : 0.034 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star VHS 1256-1257 )



  • Original Kopparapu Recent Venus for Star VHS 1256-1257 distance : 0.012 AU
  • Original Kopparapu Runaway Greenhouse for Star VHS 1256-1257 distance : 0.016 AU
  • Original Kopparapu Moist Greenhouse for Star VHS 1256-1257 distance : 0.016 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star VHS 1256-1257 distance : 0.032 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star VHS 1256-1257 distance : 0.034 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star VHS 1256-1257 )



    (Position in Stellar Map of star VHS 1256-1257 and its Exoplanet VHS 1256-1257 b)



    (Zoomed position in Stellar Map of star VHS 1256-1257 and its Exoplanet VHS 1256-1257 b (zoom level 3))

    (Synthetic Spectrum of star VHS 1256-1257 *)
    *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