Imaginary Picture of TOI-561 d

Display orbital revolution of TOI-561 d around the hoststar TOI-561
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Exoplanet Name : TOI-561 d
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.2516 (Rjup) 2.8202 (Rearth)
Mass (Mjup / Me): 0.0382 (Mjup) 12.1548 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1590 (AU) 0.1590 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0704
Orbital Period(Observed/Estimated) 25.71 (Days Obs.) 25.81 (Days Est.)
Surface Gravity (G Earth) 1.5282
Star Radiation at Atmospheric Boundary: 27018.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 572.2 (K)
Blackbody T 0.3(K) 537.4 (K)
Blackbody T 0.7(K) 434.8 (K)
Tidally Locked Blackbody T 0.1(K) 680.5 (K)
Tidally Locked Blackbody T 0.3(K) 639.0 (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-561
Alternate Name :
Star Distance(LY) : 280.5
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 10.0 (GY)
Temperature : 5326 (K)
Spectral type : K0
UV portion[%]: 6.0
Visible portion[%]: 41.7
IR portion[%]: 52.3
Metalicity : -0.4
Absolute Magnitude: 4.8
Apparent Magnitude: 9.5
Right Ascension(RA) 148.1833
Declination (DEC) 6.2161
Hubble Space Telescope Guide Star Catalog (GSC) ID 00243-01528
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-561&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-561 d
TOI-561 d

  • TOI-561 d is an exoplanet orbiting the star TOI-561, located about 280.5 light-years (86.0 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star TOI-561 has apparent magnitude of 9.5, with absolute magnitude of 4.8.
  • It is 0.8 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5326 with its spectral types of K0
  • In this planetary system, the extrasolar planet TOI-561 d orbits around the star TOI-561 every 25.7 days with its orbital distance of 0.16 AU ( 23786061.4 km)
  • (Projected orbit of TOI-561 d around its host star TOI-561)


  • The Star TOI-561 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.511 AU ( 76486319.4 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.707 AU ( 105724081.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.077 AU ( 161100103.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.585 AU ( 237065860.2 km)
  • Radiation at Planetary Boundary of TOI-561 d : 27018.54 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-561)



  • Kopparapu Recent Venus for Star TOI-561 distance : 0.544 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-561 distance : 0.689 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-561 distance : 0.665 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-561 distance : 0.730 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-561 distance : 1.233 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-561 distance : 1.301 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-561)



  • Original Kopparapu Recent Venus for Star TOI-561 distance : 0.540 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-561 distance : 0.709 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-561 distance : 0.715 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-561 distance : 1.254 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-561 distance : 1.304 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-561)



    (Position in Stellar Map of star TOI-561 and its Exoplanet TOI-561 d)



    (Zoomed position in Stellar Map of star TOI-561 and its Exoplanet TOI-561 d (zoom level 3))

    (Synthetic Spectrum of star TOI-561*)
    *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