Imaginary Picture of HAT-P-68 b

Display orbital revolution of HAT-P-68 b around the hoststar HAT-P-68
/
Exoplanet Name : HAT-P-68 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.0720 (Rjup) 12.0160 (Rearth)
Mass (Mjup / Me): 0.7240 (Mjup) 230.1871 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0300 (AU) 0.0300 (AU Est.)
Eccentricity : 0.0410
Orbital Period(Yrs) 0.0063
Orbital Period(Observed/Estimated) 2.30 (Days Obs.) 2.30 (Days Est.)
Surface Gravity (G Earth) 1.5943
Star Radiation at Atmospheric Boundary: 253283.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1001.3 (K)
Blackbody T 0.3(K) 940.3 (K)
Blackbody T 0.7(K) 760.8 (K)
Tidally Locked Blackbody T 0.1(K) 1190.7 (K)
Tidally Locked Blackbody T 0.3(K) 1118.2 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection : Radial Velocity
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HAT-P-68
Alternate Name :
Star Distance(LY) : 658.8
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.7 (Msun Estimated)
Star Age : 11.1 (GY)
Temperature : 4508 (K)
Spectral type : K4
UV portion[%]: 1.6
Visible portion[%]: 31.2
IR portion[%]: 67.2
Metalicity : -0.1
Absolute Magnitude: 7.5
Apparent Magnitude: 14.0
Right Ascension(RA) 118.7333
Declination (DEC) 23.9383
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
HAT-P-68 b
HAT-P-68 b

  • HAT-P-68 b is an exoplanet orbiting the star HAT-P-68, located about 658.8 light-years (202.0 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star HAT-P-68 has apparent magnitude of 14.0, with absolute magnitude of 7.5.
  • It is 0.7 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4508 with its spectral types of K4
  • In this planetary system, the extrasolar planet HAT-P-68 b orbits around the star HAT-P-68 every 2.3 days with its orbital distance of 0.03 AU ( 4481952.2 km)
  • (Projected orbit of HAT-P-68 b around its host star HAT-P-68)


  • The Star HAT-P-68 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.295 AU ( 44126626.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.408 AU ( 60994529.9 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.621 AU ( 92942165.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.914 AU ( 136768468.2 km)
  • Radiation at Planetary Boundary of HAT-P-68 b : 253283.23 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-68)



  • Kopparapu Recent Venus for Star HAT-P-68 distance : 0.326 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-68 distance : 0.412 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-68 distance : 0.398 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-68 distance : 0.437 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-68 distance : 0.763 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-68 distance : 0.805 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-68)



  • Original Kopparapu Recent Venus for Star HAT-P-68 distance : 0.321 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-68 distance : 0.426 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-68 distance : 0.425 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-68 distance : 0.776 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-68 distance : 0.807 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-68)



    (Position in Stellar Map of star HAT-P-68 and its Exoplanet HAT-P-68 b)



    (Zoomed position in Stellar Map of star HAT-P-68 and its Exoplanet HAT-P-68 b (zoom level 3))

    (Synthetic Spectrum of star HAT-P-68*)
    *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