Imaginary Picture of HIP 86221 b

Display orbital revolution of HIP 86221 b around the hoststar HIP 86221
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Exoplanet Name : HIP 86221 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.7100 (Mjup) 225.7360 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0310 (AU) 0.0310 (AU Est.)
Eccentricity : 0.0860
Orbital Period(Yrs) 0.0061
Orbital Period(Observed/Estimated) 2.22 (Days Obs.) 2.24 (Days Est.)
Surface Gravity (G Earth) 2.1800
Star Radiation at Atmospheric Boundary: 216676.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 962.9 (K)
Blackbody T 0.3(K) 904.3 (K)
Blackbody T 0.7(K) 731.7 (K)
Tidally Locked Blackbody T 0.1(K) 1145.1 (K)
Tidally Locked Blackbody T 0.3(K) 1075.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HIP 86221
Alternate Name :
Star Distance(LY) : 0.0
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4400 (K)
Spectral type : K5
UV portion[%]: 1.2
Visible portion[%]: 29.4
IR portion[%]: 69.4
Metalicity : 0.0
Absolute Magnitude: 25.0
Apparent Magnitude: 22.0
Right Ascension(RA) 264.2958
Declination (DEC) 27.8964
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HIP+86221&submit=SIMBAD+search
Open Exoplanet Database Link
HIP 86221 b
HIP 86221 b

  • HIP 86221 b is an exoplanet orbiting the star HIP 86221. Its discovery was publicly announced on 2021.
  • The host star HIP 86221 has apparent magnitude of 22.0, with absolute magnitude of 25.0.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4400 with its spectral types of K5
  • In this planetary system, the extrasolar planet HIP 86221 b orbits around the star HIP 86221 every 2.2 days with its orbital distance of 0.03 AU ( 4637534.0 km)
  • (Projected orbit of HIP 86221 b around its host star HIP 86221)


  • The Star HIP 86221 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.282 AU ( 42230228.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.390 AU ( 58373211.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.595 AU ( 88947856.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.875 AU ( 130890667.6 km)
  • Radiation at Planetary Boundary of HIP 86221 b : 216676.62 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HIP 86221)



  • Kopparapu Recent Venus for Star HIP 86221 distance : 0.313 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HIP 86221 distance : 0.396 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HIP 86221 distance : 0.383 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HIP 86221 distance : 0.420 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 86221 distance : 0.737 AU
  • Kopparapu Outer Boundary for Early Mars for Star HIP 86221 distance : 0.777 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HIP 86221)



  • Original Kopparapu Recent Venus for Star HIP 86221 distance : 0.309 AU
  • Original Kopparapu Runaway Greenhouse for Star HIP 86221 distance : 0.409 AU
  • Original Kopparapu Moist Greenhouse for Star HIP 86221 distance : 0.408 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 86221 distance : 0.749 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HIP 86221 distance : 0.779 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HIP 86221)



    (Position in Stellar Map of star HIP 86221 and its Exoplanet HIP 86221 b)



    (Zoomed position in Stellar Map of star HIP 86221 and its Exoplanet HIP 86221 b (zoom level 3))

    (Synthetic Spectrum of star HIP 86221*)
    *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