Imaginary Picture of HD 207897 b

Display orbital revolution of HD 207897 b around the hoststar HD 207897
/
Exoplanet Name : HD 207897 b
Alternate Name : TOI-1611 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 : HD 207897
Alternate Name : TOI-1611
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
HD 207897 b
HD 207897 b

  • HD 207897 b is an exoplanet orbiting the star HD 207897, located about 92.1 light-years (28.2 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star HD 207897 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 HD 207897 b orbits around the star HD 207897 every 16.2 days with its orbital distance of 0.12 AU ( 17413192.1 km)
  • (Projected orbit of HD 207897 b around its host star HD 207897)


  • The Star HD 207897 '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 HD 207897 b : 36320.20 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 207897)



  • Kopparapu Recent Venus for Star HD 207897 distance : 0.468 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 207897 distance : 0.592 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 207897 distance : 0.572 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 207897 distance : 0.628 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 207897 distance : 1.071 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 207897 distance : 1.129 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 207897)



  • Original Kopparapu Recent Venus for Star HD 207897 distance : 0.463 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 207897 distance : 0.610 AU
  • Original Kopparapu Moist Greenhouse for Star HD 207897 distance : 0.613 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 207897 distance : 1.089 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 207897 distance : 1.132 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 207897)



    (Position in Stellar Map of star HD 207897 and its Exoplanet HD 207897 b)



    (Zoomed position in Stellar Map of star HD 207897 and its Exoplanet HD 207897 b (zoom level 3))

    (Synthetic Spectrum of star HD 207897*)
    *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