Imaginary Picture of TOI-1611 b

Display orbital revolution of TOI-1611 b around the hoststar TOI-1611
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Exoplanet Name : TOI-1611 b
Alternate Name : HD 207897 b
Status : Confirmed
Radius (Rjup / Re): 0.2235 (Rjup) 2.5050 (Rearth)
Mass (Mjup / Me): 0.0500 (Mjup) 15.8969 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1164 (AU) 0.1164 (AU Est.)
Eccentricity : 0.0470
Orbital Period(Yrs) 0.0444
Orbital Period(Observed/Estimated) 16.20 (Days Obs.) 16.21 (Days Est.)
Surface Gravity (G Earth) 2.5334
Star Radiation at Atmospheric Boundary: 36320.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 616.1 (K)
Blackbody T 0.3(K) 578.6 (K)
Blackbody T 0.7(K) 468.2 (K)
Tidally Locked Blackbody T 0.1(K) 732.7 (K)
Tidally Locked Blackbody T 0.3(K) 688.1 (K)
Size Class: sub-Neptune-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-1611
Alternate Name : HD 207897
Star Distance(LY) : 92.1
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 7.1 (GY)
Temperature : 5071 (K)
Spectral type : K0V
UV portion[%]: 3.7
Visible portion[%]: 38.0
IR portion[%]: 58.3
Metalicity : -0.0
Absolute Magnitude: 6.1
Apparent Magnitude: 8.4
Right Ascension(RA) 325.1875
Declination (DEC) 84.3336
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+207897&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-1611 b
TOI-1611 b

  • TOI-1611 b is an exoplanet orbiting the star TOI-1611, located about 92.1 light-years (28.2 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star TOI-1611 has apparent magnitude of 8.4, with absolute magnitude of 6.1.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5071 with its spectral types of K0V
  • In this planetary system, the extrasolar planet TOI-1611 b orbits around the star TOI-1611 every 16.2 days with its orbital distance of 0.12 AU ( 17413192.1 km)
  • (Projected orbit of TOI-1611 b around its host star TOI-1611)


  • The Star TOI-1611 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.434 AU ( 64920639.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.600 AU ( 89737290.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.914 AU ( 136739771.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.345 AU ( 201218563.4 km)
  • Radiation at Planetary Boundary of TOI-1611 b : 36320.20 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1611)



  • Kopparapu Recent Venus for Star TOI-1611 distance : 0.468 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1611 distance : 0.592 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1611 distance : 0.572 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1611 distance : 0.628 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1611 distance : 1.071 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1611 distance : 1.129 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1611)



  • Original Kopparapu Recent Venus for Star TOI-1611 distance : 0.463 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1611 distance : 0.610 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1611 distance : 0.613 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1611 distance : 1.089 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1611 distance : 1.132 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1611)



    (Position in Stellar Map of star TOI-1611 and its Exoplanet TOI-1611 b)



    (Zoomed position in Stellar Map of star TOI-1611 and its Exoplanet TOI-1611 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1611*)
    *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