Imaginary Picture of HW Vir (AB) c

Display orbital revolution of HW Vir (AB) c around the hoststar HW Vir (AB)
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Exoplanet Name : HW Vir (AB) c
Alternate Name :
Radius (Rjup / Re): 2.0000 (Rjup) 22.4180 (Rearth)
Mass (Mjup / Me): 40.0000 (Mjup) 12717.5200 (Mearth)
Semi Major Axis / Orbital Distance Calculated 12.8000 (AU) 12.8000 (AU Est.)
Eccentricity : 0.4700
Orbital Period(Yrs) 46.5422
Orbital Period(Observed/Estimated) 17000.00 (Days Obs.) 21123.77 (Days Est.)
Surface Gravity (G Earth) 25.3051
Star Radiation at Atmospheric Boundary: 2.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 54.0 (K)
Blackbody T 0.3(K) 50.7 (K)
Blackbody T 0.7(K) 41.0 (K)
Tidally Locked Blackbody T 0.1(K) 64.2 (K)
Tidally Locked Blackbody T 0.3(K) 60.3 (K)
Size Class: Sub-Star-size
Mass Class:
Detection Type : Default
Mass Detection : Timing
Radius Detection : Theoretical
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HW Vir (AB)
Alternate Name :
Star Distance(LY) : 590.3
Stellar Radius(Rsun) : 0.6 (Rsun Estimated)
Stellar Mass(Msun) : 0.6 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5500 (K)
Spectral type : sdB+M
UV portion[%]: 6.9
Visible portion[%]: 43.2
IR portion[%]: 49.9
Metalicity : 0.0
Absolute Magnitude: 4.6
Apparent Magnitude: 10.9
Right Ascension(RA) 191.0843
Declination (DEC) -8.6714
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors "Horner,.; Hinse,..; Wittenmyer,..; Marshall,..; Tinney,.."
Discovery Paper - Title A dynamical analysis of the proposed circumbinary HW Virginis planetary system
Discovery Paper - Journal Mon Not R Astron Soc (2012) 427 (4): 2812-2823. DOI: https://doi.org/10.1111/j.1365-2966.2012.22046.x
Discovery Paper - URL https://academic.oup.com/mnras/article/427/4/2812/971253/A-dynamical-analysis-of-the-proposed-circumbinary
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HW+Vir+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HW%20Vir%20%28AB%29%20b/
HW Vir (AB) c
HW Vir (AB) c

  • HW Vir (AB) c is an exoplanet orbiting the star HW Vir (AB), located about 590.3 light-years (181.0 pc) away from Solar System. Its discovery was publicly announced on 2008.
  • The host star HW Vir (AB) has apparent magnitude of 10.9, with absolute magnitude of 4.6.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 5500 with its spectral types of sdB+M
  • In this planetary system, the extrasolar planet HW Vir (AB) c orbits around the star HW Vir (AB) every 17000.0 days with its orbital distance of 12.80 AU ( 1914852745.0 km)
  • (Projected orbit of HW Vir (AB) c around its host star HW Vir (AB))


  • The Star HW Vir (AB) 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.367 AU ( 54846594.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.507 AU ( 75812326.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.772 AU ( 115521208.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.136 AU ( 169994518.6 km)
  • Radiation at Planetary Boundary of HW Vir (AB) c : 2.14 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HW Vir (AB))



  • Kopparapu Recent Venus for Star HW Vir (AB) distance : 0.386 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HW Vir (AB) distance : 0.489 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HW Vir (AB) distance : 0.472 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HW Vir (AB) distance : 0.518 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HW Vir (AB) distance : 0.871 AU
  • Kopparapu Outer Boundary for Early Mars for Star HW Vir (AB) distance : 0.918 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HW Vir (AB))



  • Original Kopparapu Recent Venus for Star HW Vir (AB) distance : 0.385 AU
  • Original Kopparapu Runaway Greenhouse for Star HW Vir (AB) distance : 0.503 AU
  • Original Kopparapu Moist Greenhouse for Star HW Vir (AB) distance : 0.509 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HW Vir (AB) distance : 0.886 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HW Vir (AB) distance : 0.921 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HW Vir (AB))



    (Position in Stellar Map of star HW Vir (AB) and its Exoplanet HW Vir (AB) c)



    (Zoomed position in Stellar Map of star HW Vir (AB) and its Exoplanet HW Vir (AB) c (zoom level 3))

    (Synthetic Spectrum of star HW Vir (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