Imaginary Picture of PTFO 8-8695 b

Display orbital revolution of PTFO 8-8695 b around the hoststar PTFO 8-8695
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Exoplanet Name : PTFO 8-8695 b
Alternate Name : CVSO 30 b
Status : Controversial
Radius (Rjup / Re): 0.3600 (Rjup) 4.0352 (Rearth)
Mass (Mjup / Me): 5.6000 (Mjup) 1780.4528 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0083 (AU) 0.0083 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0012
Orbital Period(Observed/Estimated) 0.45 (Days Obs.) 0.44 (Days Est.)
Surface Gravity (G Earth) 109.3432
Star Radiation at Atmospheric Boundary: 699702.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1290.8 (K)
Blackbody T 0.3(K) 1212.2 (K)
Blackbody T 0.7(K) 980.8 (K)
Tidally Locked Blackbody T 0.1(K) 1535.1 (K)
Tidally Locked Blackbody T 0.3(K) 1441.6 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : PTFO 8-8695
Alternate Name : CVSO 30
Star Distance(LY) : 1076.3
Stellar Radius(Rsun) : 0.5 (Rsun Measured)
Stellar Mass(Msun) : 0.4 (Msun Measured) 0.4 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3740 (K)
Spectral type : M3 PMS
UV portion[%]: 0.4
Visible portion[%]: 18.8
IR portion[%]: 80.8
Metalicity : 0.0
Absolute Magnitude: 8.7
Apparent Magnitude: 16.3
Right Ascension(RA) 81.2815
Declination (DEC) 1.5733
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=CVSO+30+&submit=SIMBAD+search
Open Exoplanet Database Link
PTFO 8-8695 b
PTFO 8-8695 b

  • PTFO 8-8695 b is an exoplanet orbiting the star PTFO 8-8695, located about 1076.3 light-years (330.0 pc) away from Solar System. Its discovery was publicly announced on 2012.
  • The host star PTFO 8-8695 has apparent magnitude of 16.3, with absolute magnitude of 8.7.
  • It is 0.4 times more massive and 0.5 times bigger compared with our Sun. The surface temperature is 3740 with its spectral types of M3 PMS
  • In this planetary system, the extrasolar planet PTFO 8-8695 b orbits around the star PTFO 8-8695 every 0.4 days with its orbital distance of 0.01 AU ( 1246599.1 km)
  • (Projected orbit of PTFO 8-8695 b around its host star PTFO 8-8695)


  • The Star PTFO 8-8695 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.136 AU ( 20399232.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.188 AU ( 28197070.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.287 AU ( 42966095.4 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.423 AU ( 63226491.6 km)
  • Radiation at Planetary Boundary of PTFO 8-8695 b : 699702.59 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star PTFO 8-8695)



  • Kopparapu Recent Venus for Star PTFO 8-8695 distance : 0.154 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star PTFO 8-8695 distance : 0.194 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star PTFO 8-8695 distance : 0.188 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star PTFO 8-8695 distance : 0.206 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star PTFO 8-8695 distance : 0.374 AU
  • Kopparapu Outer Boundary for Early Mars for Star PTFO 8-8695 distance : 0.394 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star PTFO 8-8695)



  • Original Kopparapu Recent Venus for Star PTFO 8-8695 distance : 0.152 AU
  • Original Kopparapu Runaway Greenhouse for Star PTFO 8-8695 distance : 0.201 AU
  • Original Kopparapu Moist Greenhouse for Star PTFO 8-8695 distance : 0.201 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star PTFO 8-8695 distance : 0.380 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star PTFO 8-8695 distance : 0.395 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star PTFO 8-8695)



    (Position in Stellar Map of star PTFO 8-8695 and its Exoplanet PTFO 8-8695 b)



    (Zoomed position in Stellar Map of star PTFO 8-8695 and its Exoplanet PTFO 8-8695 b (zoom level 3))

    (Synthetic Spectrum of star PTFO 8-8695*)
    *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