Imaginary Picture of HIP 88399 b

Display orbital revolution of HIP 88399 b around the hoststar HIP 88399
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Exoplanet Name : HIP 88399 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 6.0000 (Mjup) 1907.6280 (Mearth)
Semi Major Axis / Orbital Distance Calculated 8.0000 (AU) 8.0000 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0000
Orbital Period(Observed/Estimated) 0.00 (Days Obs.) 7276.63 (Days Est.)
Surface Gravity (G Earth) 18.4226
Star Radiation at Atmospheric Boundary: 50.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 118.7 (K)
Blackbody T 0.3(K) 111.5 (K)
Blackbody T 0.7(K) 90.2 (K)
Tidally Locked Blackbody T 0.1(K) 141.2 (K)
Tidally Locked Blackbody T 0.3(K) 132.6 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Astrometry
Mass Detection : Astrometry
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HIP 88399
Alternate Name :
Star Distance(LY) : 160.8
Stellar Radius(Rsun) : 1.2 (Rsun Estimated)
Stellar Mass(Msun) : 1.3 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6550 (K)
Spectral type : F6V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 18.5
Apparent Magnitude: 22.0
Right Ascension(RA) 270.7625
Declination (DEC) -51.6489
Hubble Space Telescope Guide Star Catalog (GSC) ID 08369-01619
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HIP+88399&submit=SIMBAD+search
Open Exoplanet Database Link
HIP 88399 b
HIP 88399 b

  • HIP 88399 b is an exoplanet orbiting the star HIP 88399, located about 160.8 light-years (49.3 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star HIP 88399 has apparent magnitude of 22.0, with absolute magnitude of 18.5.
  • It is 1.3 times more massive and 1.2 times bigger compared with our Sun. The surface temperature is 6550 with its spectral types of F6V
  • (Projected orbit of HIP 88399 b around its host star HIP 88399)


  • The Star HIP 88399 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.107 AU ( 165666967.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.531 AU ( 228995043.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.333 AU ( 348937769.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.432 AU ( 513477213.2 km)
  • Radiation at Planetary Boundary of HIP 88399 b : 50.07 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HIP 88399)



  • Kopparapu Recent Venus for Star HIP 88399 distance : 1.096 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HIP 88399 distance : 1.388 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HIP 88399 distance : 1.340 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HIP 88399 distance : 1.468 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 88399 distance : 2.412 AU
  • Kopparapu Outer Boundary for Early Mars for Star HIP 88399 distance : 2.544 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HIP 88399)



  • Original Kopparapu Recent Venus for Star HIP 88399 distance : 1.116 AU
  • Original Kopparapu Runaway Greenhouse for Star HIP 88399 distance : 1.422 AU
  • Original Kopparapu Moist Greenhouse for Star HIP 88399 distance : 1.476 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HIP 88399 distance : 2.456 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HIP 88399 distance : 2.554 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HIP 88399)



    (Position in Stellar Map of star HIP 88399 and its Exoplanet HIP 88399 b)



    (Zoomed position in Stellar Map of star HIP 88399 and its Exoplanet HIP 88399 b (zoom level 3))

    (Synthetic Spectrum of star HIP 88399*)
    *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