Imaginary Picture of ASASSN-17jf b

Display orbital revolution of ASASSN-17jf b around the hoststar ASASSN-17jf
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Exoplanet Name : ASASSN-17jf b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.1200 (Rjup) 12.5541 (Rearth)
Mass (Mjup / Me): 60.0000 (Mjup) 19076.2800 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0026 (AU) 0.0026 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0002
Orbital Period(Observed/Estimated) 0.06 (Days Obs.) 0.06 (Days Est.)
Surface Gravity (G Earth) 121.0386
Star Radiation at Atmospheric Boundary: 3098.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 333.0 (K)
Blackbody T 0.3(K) 312.7 (K)
Blackbody T 0.7(K) 253.0 (K)
Tidally Locked Blackbody T 0.1(K) 396.0 (K)
Tidally Locked Blackbody T 0.3(K) 371.9 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Default
Mass Detection : Theoretical
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : ASASSN-17jf
Alternate Name :
Star Distance(LY) : 932.8
Stellar Radius(Rsun) : 0.0 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3300 (K)
Spectral type : M9
UV portion[%]: 0.2
Visible portion[%]: 11.2
IR portion[%]: 88.6
Metalicity : 0.0
Absolute Magnitude: 12.7
Apparent Magnitude: 20.0
Right Ascension(RA) 307.3208
Declination (DEC) -43.6722
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
ASASSN-17jf b
ASASSN-17jf b

  • ASASSN-17jf b is an exoplanet orbiting the star ASASSN-17jf, located about 932.8 light-years (286.0 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star ASASSN-17jf has apparent magnitude of 20.0, with absolute magnitude of 12.7.
  • It is 0.7 times more massive and 0.0 times bigger compared with our Sun. The surface temperature is 3300 with its spectral types of M9
  • In this planetary system, the extrasolar planet ASASSN-17jf b orbits around the star ASASSN-17jf every 0.1 days with its orbital distance of 0.00 AU ( 388954.5 km)
  • (Projected orbit of ASASSN-17jf b around its host star ASASSN-17jf)


  • The Star ASASSN-17jf 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.003 AU ( 423513.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.004 AU ( 585406.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.006 AU ( 892029.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.009 AU ( 1312660.7 km)
  • Radiation at Planetary Boundary of ASASSN-17jf b : 3097.96 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star ASASSN-17jf)



  • Kopparapu Recent Venus for Star ASASSN-17jf distance : 0.003 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star ASASSN-17jf distance : 0.004 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star ASASSN-17jf distance : 0.004 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star ASASSN-17jf distance : 0.004 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star ASASSN-17jf distance : 0.008 AU
  • Kopparapu Outer Boundary for Early Mars for Star ASASSN-17jf distance : 0.008 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star ASASSN-17jf)



  • Original Kopparapu Recent Venus for Star ASASSN-17jf distance : 0.003 AU
  • Original Kopparapu Runaway Greenhouse for Star ASASSN-17jf distance : 0.004 AU
  • Original Kopparapu Moist Greenhouse for Star ASASSN-17jf distance : 0.004 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star ASASSN-17jf distance : 0.008 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star ASASSN-17jf distance : 0.008 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star ASASSN-17jf)



    (Position in Stellar Map of star ASASSN-17jf and its Exoplanet ASASSN-17jf b)



    (Zoomed position in Stellar Map of star ASASSN-17jf and its Exoplanet ASASSN-17jf b (zoom level 3))

    (Synthetic Spectrum of star ASASSN-17jf*)
    *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