Imaginary Picture of TOI-677 b

Display orbital revolution of TOI-677 b around the hoststar TOI-677
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Exoplanet Name : TOI-677 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.1700 (Rjup) 13.1145 (Rearth)
Mass (Mjup / Me): 1.2340 (Mjup) 392.3355 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1038 (AU) 0.1038 (AU Est.)
Eccentricity : 0.4600
Orbital Period(Yrs) 0.0308
Orbital Period(Observed/Estimated) 11.24 (Days Obs.) 11.24 (Days Est.)
Surface Gravity (G Earth) 2.2811
Star Radiation at Atmospheric Boundary: 292828.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1038.2 (K)
Blackbody T 0.3(K) 975.0 (K)
Blackbody T 0.7(K) 788.9 (K)
Tidally Locked Blackbody T 0.1(K) 1234.7 (K)
Tidally Locked Blackbody T 0.3(K) 1159.5 (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 : TOI-677
Alternate Name : HD 297549
Star Distance(LY) : 466.4
Stellar Radius(Rsun) : 1.3 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 2.9 (GY)
Temperature : 6295 (K)
Spectral type : F8
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 3.9
Apparent Magnitude: 9.7
Right Ascension(RA) 144.1195
Declination (DEC) -50.4633
Hubble Space Telescope Guide Star Catalog (GSC) ID 08176-02431
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=TOI-677&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-677 b
TOI-677 b

  • TOI-677 b is an exoplanet orbiting the star TOI-677, located about 466.4 light-years (143.0 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star TOI-677 has apparent magnitude of 9.7, with absolute magnitude of 3.9.
  • It is 1.2 times more massive and 1.3 times bigger compared with our Sun. The surface temperature is 6295 with its spectral types of F8
  • In this planetary system, the extrasolar planet TOI-677 b orbits around the star TOI-677 every 11.2 days with its orbital distance of 0.10 AU ( 15528259.0 km)
  • (Projected orbit of TOI-677 b around its host star TOI-677)


  • The Star TOI-677 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.099 AU ( 164384002.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.519 AU ( 227221650.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.314 AU ( 346235511.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.406 AU ( 509500722.1 km)
  • Radiation at Planetary Boundary of TOI-677 b : 292828.26 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-677)



  • Kopparapu Recent Venus for Star TOI-677 distance : 1.104 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-677 distance : 1.398 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-677 distance : 1.350 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-677 distance : 1.479 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-677 distance : 2.440 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-677 distance : 2.573 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-677)



  • Original Kopparapu Recent Venus for Star TOI-677 distance : 1.117 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-677 distance : 1.434 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-677 distance : 1.479 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-677 distance : 2.484 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-677 distance : 2.583 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-677)



    (Position in Stellar Map of star TOI-677 and its Exoplanet TOI-677 b)



    (Zoomed position in Stellar Map of star TOI-677 and its Exoplanet TOI-677 b (zoom level 3))

    (Synthetic Spectrum of star TOI-677*)
    *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