Imaginary Picture of HS 2201+2610 b

Display orbital revolution of HS 2201+2610 b around the hoststar HS 2201+2610
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Exoplanet Name : HS 2201+2610 b
Alternate Name : *V391 Peg b
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 3.2000 (Mjup) 1017.4016 (Mearth)
Semi Major Axis / Orbital Distance Calculated 1.7000 (AU) 1.7000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 3.2032
Orbital Period(Observed/Estimated) 1170.00 (Days Obs.) 1144.93 (Days Est.)
Surface Gravity (G Earth) 9.8254
Star Radiation at Atmospheric Boundary: 16543.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 506.2 (K)
Blackbody T 0.3(K) 475.4 (K)
Blackbody T 0.7(K) 384.6 (K)
Tidally Locked Blackbody T 0.1(K) 601.9 (K)
Tidally Locked Blackbody T 0.3(K) 565.3 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Timing
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HS 2201+2610
Alternate Name : *V391 Peg
Star Distance(LY) : 4566.2
Stellar Radius(Rsun) : 0.2 (Rsun Measured)
Stellar Mass(Msun) : 0.5 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 10.0 (GY)
Temperature : 29300 (K)
Spectral type : sdB
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 3.8
Apparent Magnitude: 14.6
Right Ascension(RA) 331.0500
Declination (DEC) 26.4189
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
HS 2201+2610 b
HS 2201+2610 b

  • HS 2201+2610 b is an exoplanet orbiting the star HS 2201+2610, located about 4566.2 light-years (1400.0 pc) away from Solar System. Its discovery was publicly announced on 2007.
  • The host star HS 2201+2610 has apparent magnitude of 14.6, with absolute magnitude of 3.8.
  • It is 0.5 times more massive and 0.2 times bigger compared with our Sun. The surface temperature is 29300 with its spectral types of sdB
  • In this planetary system, the extrasolar planet HS 2201+2610 b orbits around the star HS 2201+2610 every 1170.0 days with its orbital distance of 1.70 AU ( 254316380.2 km)
  • (Projected orbit of HS 2201+2610 b around its host star HS 2201+2610)


  • The Star HS 2201+2610 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 4.278 AU ( 639913377.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 5.913 AU ( 884527516.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 9.010 AU ( 1347824190.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 13.258 AU ( 1983382340.3 km)
  • Radiation at Planetary Boundary of HS 2201+2610 b : 16543.72 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HS 2201+2610)



  • Kopparapu Recent Venus for Star HS 2201+2610 distance : nan AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HS 2201+2610 distance : nan AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HS 2201+2610 distance : nan AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HS 2201+2610 distance : nan AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HS 2201+2610 distance : nan AU
  • Kopparapu Outer Boundary for Early Mars for Star HS 2201+2610 distance : nan AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HS 2201+2610)



  • Original Kopparapu Recent Venus for Star HS 2201+2610 distance : nan AU
  • Original Kopparapu Runaway Greenhouse for Star HS 2201+2610 distance : nan AU
  • Original Kopparapu Moist Greenhouse for Star HS 2201+2610 distance : nan AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HS 2201+2610 distance : nan AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HS 2201+2610 distance : nan AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HS 2201+2610)



    (Position in Stellar Map of star HS 2201+2610 and its Exoplanet HS 2201+2610 b)



    (Zoomed position in Stellar Map of star HS 2201+2610 and its Exoplanet HS 2201+2610 b (zoom level 3))

    (Synthetic Spectrum of star HS 2201+2610*)
    *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