Imaginary Picture of TOI-1726 c

Display orbital revolution of TOI-1726 c around the hoststar HD 63433
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Exoplanet Name : TOI-1726 c
Alternate Name : HD 63433 c
Status : Confirmed
Radius (Rjup / Re): 0.2427 (Rjup) 2.7204 (Rearth)
Mass (Mjup / Me): 0.0482 (Mjup) 15.3246 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1458 (AU) 0.1458 (AU Est.)
Eccentricity : 0.0970
Orbital Period(Yrs) 0.0562
Orbital Period(Observed/Estimated) 20.54 (Days Obs.) 20.44 (Days Est.)
Surface Gravity (G Earth) 2.0707
Star Radiation at Atmospheric Boundary: 48550.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 662.5 (K)
Blackbody T 0.3(K) 622.2 (K)
Blackbody T 0.7(K) 503.4 (K)
Tidally Locked Blackbody T 0.1(K) 787.9 (K)
Tidally Locked Blackbody T 0.3(K) 739.9 (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 63433
Alternate Name : TOI-1726
Star Distance(LY) : 73.1
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.4 (GY)
Temperature : 5640 (K)
Spectral type : G5
UV portion[%]: 7.4
Visible portion[%]: 44.1
IR portion[%]: 48.5
Metalicity : 0.0
Absolute Magnitude: 5.2
Apparent Magnitude: 7.0
Right Ascension(RA) 117.4794
Declination (DEC) 27.3633
Hubble Space Telescope Guide Star Catalog (GSC) ID 01933-00747
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=HD+63433+&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-1726 c
TOI-1726 c

  • TOI-1726 c is an exoplanet orbiting the star HD 63433, located about 73.1 light-years (22.4 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star HD 63433 has apparent magnitude of 7.0, with absolute magnitude of 5.2.
  • It is 1.0 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5640 with its spectral types of G5
  • In this planetary system, the extrasolar planet TOI-1726 c orbits around the star HD 63433 every 20.5 days with its orbital distance of 0.15 AU ( 21811369.5 km)
  • (Projected orbit of TOI-1726 c around its host star HD 63433)


  • The Star HD 63433 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.628 AU ( 94018032.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.869 AU ( 129957490.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.324 AU ( 198026456.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.948 AU ( 291404605.7 km)
  • Radiation at Planetary Boundary of TOI-1726 c : 48550.74 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 63433)



  • Kopparapu Recent Venus for Star HD 63433 distance : 0.657 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 63433 distance : 0.832 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 63433 distance : 0.803 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 63433 distance : 0.881 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 63433 distance : 1.474 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 63433 distance : 1.555 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 63433)



  • Original Kopparapu Recent Venus for Star HD 63433 distance : 0.656 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 63433 distance : 0.855 AU
  • Original Kopparapu Moist Greenhouse for Star HD 63433 distance : 0.868 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 63433 distance : 1.500 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 63433 distance : 1.560 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 63433)



    (Position in Stellar Map of star HD 63433 and its Exoplanet TOI-1726 c)



    (Zoomed position in Stellar Map of star HD 63433 and its Exoplanet TOI-1726 c (zoom level 3))

    (Synthetic Spectrum of star HD 63433*)
    *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