Imaginary Picture of TOI-1749 d

Display orbital revolution of TOI-1749 d around the hoststar TOI-1749
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Exoplanet Name : TOI-1749 d
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2248 (Rjup) 2.5198 (Rearth)
Mass (Mjup / Me): 0.0135 (Mjup) 4.2922 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0707 (AU) 0.0707 (AU Est.)
Eccentricity : 0.0150
Orbital Period(Yrs) 0.0248
Orbital Period(Observed/Estimated) 9.05 (Days Obs.) 9.02 (Days Est.)
Surface Gravity (G Earth) 0.6760
Star Radiation at Atmospheric Boundary: 18715.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 522.0 (K)
Blackbody T 0.3(K) 490.2 (K)
Blackbody T 0.7(K) 396.7 (K)
Tidally Locked Blackbody T 0.1(K) 620.8 (K)
Tidally Locked Blackbody T 0.3(K) 583.0 (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-1749
Alternate Name :
Star Distance(LY) : 324.7
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3985 (K)
Spectral type : M0V
UV portion[%]: 0.7
Visible portion[%]: 24.1
IR portion[%]: 75.1
Metalicity : -0.3
Absolute Magnitude: 8.9
Apparent Magnitude: 13.9
Right Ascension(RA) 282.7375
Declination (DEC) 64.4194
Hubble Space Telescope Guide Star Catalog (GSC) ID
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-1749&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-1749 d
TOI-1749 d

  • TOI-1749 d is an exoplanet orbiting the star TOI-1749, located about 324.7 light-years (99.6 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star TOI-1749 has apparent magnitude of 13.9, with absolute magnitude of 8.9.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 3985 with its spectral types of M0V
  • In this planetary system, the extrasolar planet TOI-1749 d orbits around the star TOI-1749 every 9.0 days with its orbital distance of 0.07 AU ( 10576569.5 km)
  • (Projected orbit of TOI-1749 d around its host star TOI-1749)


  • The Star TOI-1749 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.189 AU ( 28305931.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.262 AU ( 39126194.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.399 AU ( 59619662.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.586 AU ( 87732944.7 km)
  • Radiation at Planetary Boundary of TOI-1749 d : 18715.64 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1749)



  • Kopparapu Recent Venus for Star TOI-1749 distance : 0.212 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1749 distance : 0.268 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1749 distance : 0.259 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1749 distance : 0.285 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1749 distance : 0.510 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1749 distance : 0.538 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1749)



  • Original Kopparapu Recent Venus for Star TOI-1749 distance : 0.209 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1749 distance : 0.278 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1749 distance : 0.277 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1749 distance : 0.518 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1749 distance : 0.539 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1749)



    (Position in Stellar Map of star TOI-1749 and its Exoplanet TOI-1749 d)



    (Zoomed position in Stellar Map of star TOI-1749 and its Exoplanet TOI-1749 d (zoom level 3))

    (Synthetic Spectrum of star TOI-1749*)
    *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