Imaginary Picture of TOI-554 c

Display orbital revolution of TOI-554 c around the hoststar TOI-554
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Exoplanet Name : TOI-554 c
Alternate Name : HD 25463 c
Status : Confirmed
Radius (Rjup / Re): 0.1340 (Rjup) 1.5020 (Rearth)
Mass (Mjup / Me): 0.0129 (Mjup) 4.1014 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0442 (AU Est.)
Eccentricity : 0.2300
Orbital Period(Yrs) 0.0083
Orbital Period(Observed/Estimated) 3.04 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 1.8180
Star Radiation at Atmospheric Boundary: 2074862.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1693.9 (K)
Blackbody T 0.3(K) 1590.8 (K)
Blackbody T 0.7(K) 1287.1 (K)
Tidally Locked Blackbody T 0.1(K) 2014.4 (K)
Tidally Locked Blackbody T 0.3(K) 1891.7 (K)
Size Class: super-Earth-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-554
Alternate Name : HD 25463
Star Distance(LY) : 148.8
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.2 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6338 (K)
Spectral type : F8
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 3.6
Apparent Magnitude: 6.9
Right Ascension(RA) 60.7500
Declination (DEC) 9.2078
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-554 c
TOI-554 c

  • TOI-554 c is an exoplanet orbiting the star TOI-554, located about 148.8 light-years (45.6 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star TOI-554 has apparent magnitude of 6.9, with absolute magnitude of 3.6.
  • It is 1.2 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6338 with its spectral types of F8
  • In this planetary system, the extrasolar planet TOI-554 c orbits around the star TOI-554 every 3.0 days with its orbital distance of 0.04 AU ( 6606534.1 km)
  • (Projected orbit of TOI-554 c around its host star TOI-554)


  • The Star TOI-554 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.244 AU ( 186165250.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.720 AU ( 257329027.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.621 AU ( 392112490.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.857 AU ( 577010707.7 km)
  • Radiation at Planetary Boundary of TOI-554 c : 2074862.36 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-554)



  • Kopparapu Recent Venus for Star TOI-554 distance : 1.247 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-554 distance : 1.579 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-554 distance : 1.525 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-554 distance : 1.671 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-554 distance : 2.754 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-554 distance : 2.905 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-554)



  • Original Kopparapu Recent Venus for Star TOI-554 distance : 1.263 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-554 distance : 1.619 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-554 distance : 1.672 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-554 distance : 2.804 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-554 distance : 2.916 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-554)



    (Position in Stellar Map of star TOI-554 and its Exoplanet TOI-554 c)



    (Zoomed position in Stellar Map of star TOI-554 and its Exoplanet TOI-554 c (zoom level 3))

    (Synthetic Spectrum of star TOI-554*)
    *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