Imaginary Picture of TOI-4377 b

Display orbital revolution of TOI-4377 b around the hoststar TOI-4377
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Exoplanet Name : TOI-4377 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.3500 (Rjup) 15.1322 (Rearth)
Mass (Mjup / Me): 0.9570 (Mjup) 304.2667 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0579 (AU) 0.0579 (AU Est.)
Eccentricity : 0.0450
Orbital Period(Yrs) 0.0120
Orbital Period(Observed/Estimated) 4.38 (Days Obs.) 4.36 (Days Est.)
Surface Gravity (G Earth) 1.3288
Star Radiation at Atmospheric Boundary: 2774317.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1821.5 (K)
Blackbody T 0.3(K) 1710.6 (K)
Blackbody T 0.7(K) 1384.0 (K)
Tidally Locked Blackbody T 0.1(K) 2166.2 (K)
Tidally Locked Blackbody T 0.3(K) 2034.2 (K)
Size Class: Super-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-4377
Alternate Name :
Star Distance(LY) : 1497.1
Stellar Radius(Rsun) : 3.5 (Rsun Measured)
Stellar Mass(Msun) : 1.4 (Msun Measured) 1.4 (Msun Estimated)
Star Age : 3.9 (GY)
Temperature : 4974 (K)
Spectral type : K2
UV portion[%]: 3.1
Visible portion[%]: 36.8
IR portion[%]: 60.1
Metalicity : 0.2
Absolute Magnitude: 3.4
Apparent Magnitude: 11.7
Right Ascension(RA) 164.9333
Declination (DEC) -82.2214
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-4377 b
TOI-4377 b

  • TOI-4377 b is an exoplanet orbiting the star TOI-4377, located about 1497.1 light-years (459.0 pc) away from Solar System. Its discovery was publicly announced on 2023.
  • The host star TOI-4377 has apparent magnitude of 11.7, with absolute magnitude of 3.4.
  • It is 1.4 times more massive and 3.5 times bigger compared with our Sun. The surface temperature is 4974 with its spectral types of K2
  • In this planetary system, the extrasolar planet TOI-4377 b orbits around the star TOI-4377 every 4.4 days with its orbital distance of 0.06 AU ( 8661716.7 km)
  • (Projected orbit of TOI-4377 b around its host star TOI-4377)


  • The Star TOI-4377 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.887 AU ( 282235954.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.608 AU ( 390123845.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.974 AU ( 594462406.5 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 5.848 AU ( 874777472.9 km)
  • Radiation at Planetary Boundary of TOI-4377 b : 2774317.32 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-4377)



  • Kopparapu Recent Venus for Star TOI-4377 distance : 2.043 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-4377 distance : 2.587 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-4377 distance : 2.499 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-4377 distance : 2.742 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-4377 distance : 4.694 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-4377 distance : 4.951 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-4377)



  • Original Kopparapu Recent Venus for Star TOI-4377 distance : 2.021 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-4377 distance : 2.666 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-4377 distance : 2.675 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-4377 distance : 4.773 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-4377 distance : 4.963 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-4377)



    (Position in Stellar Map of star TOI-4377 and its Exoplanet TOI-4377 b)



    (Zoomed position in Stellar Map of star TOI-4377 and its Exoplanet TOI-4377 b (zoom level 3))

    (Synthetic Spectrum of star TOI-4377*)
    *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