Imaginary Picture of TOI-1605 b

Display orbital revolution of TOI-1605 b around the hoststar TOI-1605
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Exoplanet Name : TOI-1605 b
Alternate Name : "HD 278878 b, TOI-1601.01"
Status : Confirmed
Radius (Rjup / Re): 0.9225 (Rjup) 10.3403 (Rearth)
Mass (Mjup / Me): 0.6963 (Mjup) 221.3802 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0826 (AU) 0.0826 (AU Est.)
Eccentricity : 0.2800
Orbital Period(Yrs) 0.0238
Orbital Period(Observed/Estimated) 8.71 (Days Obs.) 8.72 (Days Est.)
Surface Gravity (G Earth) 2.0705
Star Radiation at Atmospheric Boundary: 447824.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1154.6 (K)
Blackbody T 0.3(K) 1084.3 (K)
Blackbody T 0.7(K) 877.3 (K)
Tidally Locked Blackbody T 0.1(K) 1373.0 (K)
Tidally Locked Blackbody T 0.3(K) 1289.4 (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 : TOI-1605
Alternate Name : HD 278878
Star Distance(LY) : 521.0
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 8.3 (GY)
Temperature : 5597 (K)
Spectral type : G5IV
UV portion[%]: 7.3
Visible portion[%]: 43.8
IR portion[%]: 48.9
Metalicity : 0.0
Absolute Magnitude: 4.2
Apparent Magnitude: 10.2
Right Ascension(RA) 54.4811
Declination (DEC) 33.0799
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
TOI-1605 b
TOI-1605 b

  • TOI-1605 b is an exoplanet orbiting the star TOI-1605, located about 521.0 light-years (159.7 pc) away from Solar System. Its discovery was publicly announced on 2024.
  • The host star TOI-1605 has apparent magnitude of 10.2, with absolute magnitude of 4.2.
  • It is 1.0 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 5597 with its spectral types of G5IV
  • In this planetary system, the extrasolar planet TOI-1605 b orbits around the star TOI-1605 every 8.7 days with its orbital distance of 0.08 AU ( 12353792.2 km)
  • (Projected orbit of TOI-1605 b around its host star TOI-1605)


  • The Star TOI-1605 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.081 AU ( 161727734.2 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.494 AU ( 223549993.1 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.277 AU ( 340640718.0 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.351 AU ( 501267739.1 km)
  • Radiation at Planetary Boundary of TOI-1605 b : 447824.48 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1605)



  • Kopparapu Recent Venus for Star TOI-1605 distance : 1.133 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1605 distance : 1.434 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1605 distance : 1.385 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1605 distance : 1.519 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1605 distance : 2.546 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1605 distance : 2.685 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1605)



  • Original Kopparapu Recent Venus for Star TOI-1605 distance : 1.130 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1605 distance : 1.475 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1605 distance : 1.495 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1605 distance : 2.590 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1605 distance : 2.693 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1605)



    (Position in Stellar Map of star TOI-1605 and its Exoplanet TOI-1605 b)



    (Zoomed position in Stellar Map of star TOI-1605 and its Exoplanet TOI-1605 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1605*)
    *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