Imaginary Picture of HD 25171 b

Display orbital revolution of HD 25171 b around the hoststar HD 25171
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Exoplanet Name : HD 25171 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.9500 (Mjup) 302.0411 (Mearth)
Semi Major Axis / Orbital Distance Calculated 3.0200 (AU) 3.0200 (AU Est.)
Eccentricity : 0.0800
Orbital Period(Yrs) 5.0512
Orbital Period(Observed/Estimated) 1845.00 (Days Obs.) 1836.06 (Days Est.)
Surface Gravity (G Earth) 2.9169
Star Radiation at Atmospheric Boundary: 269.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 180.8 (K)
Blackbody T 0.3(K) 169.8 (K)
Blackbody T 0.7(K) 137.4 (K)
Tidally Locked Blackbody T 0.1(K) 215.1 (K)
Tidally Locked Blackbody T 0.3(K) 202.0 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 25171
Alternate Name :
Star Distance(LY) : 185.3
Stellar Radius(Rsun) : 1.2 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.1 (Msun Estimated)
Star Age : 2.0 (GY)
Temperature : 6160 (K)
Spectral type : F8V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : -0.1
Absolute Magnitude: 4.0
Apparent Magnitude: 7.8
Right Ascension(RA) 58.9560
Declination (DEC) -65.1867
Hubble Space Telescope Guide Star Catalog (GSC) ID 08874-00376
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+25171+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2025171%20b/
HD 25171 b
HD 25171 b

  • HD 25171 b is an exoplanet orbiting the star HD 25171, located about 185.3 light-years (56.8 pc) away from Solar System. Its discovery was publicly announced on 2010.
  • The host star HD 25171 has apparent magnitude of 7.8, with absolute magnitude of 4.0.
  • It is 1.1 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 6160 with its spectral types of F8V
  • In this planetary system, the extrasolar planet HD 25171 b orbits around the star HD 25171 every 1845.0 days with its orbital distance of 3.02 AU ( 451785569.5 km)
  • (Projected orbit of HD 25171 b around its host star HD 25171)


  • The Star HD 25171 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.970 AU ( 145111404.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.341 AU ( 200581882.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.043 AU ( 305642400.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.007 AU ( 449766181.3 km)
  • Radiation at Planetary Boundary of HD 25171 b : 269.57 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 25171)



  • Kopparapu Recent Venus for Star HD 25171 distance : 0.982 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 25171 distance : 1.244 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 25171 distance : 1.201 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 25171 distance : 1.317 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 25171 distance : 2.177 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 25171 distance : 2.296 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 25171)



  • Original Kopparapu Recent Venus for Star HD 25171 distance : 0.992 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 25171 distance : 1.277 AU
  • Original Kopparapu Moist Greenhouse for Star HD 25171 distance : 1.312 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 25171 distance : 2.216 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 25171 distance : 2.305 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 25171)



    (Position in Stellar Map of star HD 25171 and its Exoplanet HD 25171 b)



    (Zoomed position in Stellar Map of star HD 25171 and its Exoplanet HD 25171 b (zoom level 3))

    (Synthetic Spectrum of star HD 25171*)
    *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