Imaginary Picture of TOI-1847 b

Display orbital revolution of TOI-1847 b around the hoststar NGTS-11
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Exoplanet Name : TOI-1847 b
Alternate Name : NGTS-11 b
Status : Confirmed
Radius (Rjup / Re): 0.8230 (Rjup) 9.2250 (Rearth)
Mass (Mjup / Me): 0.3700 (Mjup) 117.6371 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.2000 (AU) 0.2000 (AU Est.)
Eccentricity : 0.1100
Orbital Period(Yrs) 0.0971
Orbital Period(Observed/Estimated) 35.46 (Days Obs.) 35.19 (Days Est.)
Surface Gravity (G Earth) 1.3823
Star Radiation at Atmospheric Boundary: 13802.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 483.8 (K)
Blackbody T 0.3(K) 454.3 (K)
Blackbody T 0.7(K) 367.6 (K)
Tidally Locked Blackbody T 0.1(K) 575.3 (K)
Tidally Locked Blackbody T 0.3(K) 540.3 (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 : NGTS-11
Alternate Name : TIC-54002556
Star Distance(LY) : 624.6
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 3.9 (GY)
Temperature : 5050 (K)
Spectral type : K1
UV portion[%]: 3.6
Visible portion[%]: 37.7
IR portion[%]: 58.7
Metalicity : 0.2
Absolute Magnitude: 15.6
Apparent Magnitude: 22.0
Right Ascension(RA) 23.5208
Declination (DEC) -14.4192
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=NGTS-11&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-1847 b
TOI-1847 b

  • TOI-1847 b is an exoplanet orbiting the star NGTS-11, located about 624.6 light-years (191.5 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star NGTS-11 has apparent magnitude of 22.0, with absolute magnitude of 15.6.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5050 with its spectral types of K1
  • In this planetary system, the extrasolar planet TOI-1847 b orbits around the star NGTS-11 every 35.5 days with its orbital distance of 0.20 AU ( 29919574.1 km)
  • (Projected orbit of TOI-1847 b around its host star NGTS-11)


  • The Star NGTS-11 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.460 AU ( 68764485.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.635 AU ( 95050488.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.968 AU ( 144835910.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.425 AU ( 213132386.5 km)
  • Radiation at Planetary Boundary of TOI-1847 b : 13802.48 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NGTS-11)



  • Kopparapu Recent Venus for Star NGTS-11 distance : 0.496 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star NGTS-11 distance : 0.628 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star NGTS-11 distance : 0.607 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star NGTS-11 distance : 0.666 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-11 distance : 1.136 AU
  • Kopparapu Outer Boundary for Early Mars for Star NGTS-11 distance : 1.198 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NGTS-11)



  • Original Kopparapu Recent Venus for Star NGTS-11 distance : 0.491 AU
  • Original Kopparapu Runaway Greenhouse for Star NGTS-11 distance : 0.647 AU
  • Original Kopparapu Moist Greenhouse for Star NGTS-11 distance : 0.650 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-11 distance : 1.155 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NGTS-11 distance : 1.201 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star NGTS-11)



    (Position in Stellar Map of star NGTS-11 and its Exoplanet TOI-1847 b)



    (Zoomed position in Stellar Map of star NGTS-11 and its Exoplanet TOI-1847 b (zoom level 3))

    (Synthetic Spectrum of star NGTS-11*)
    *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