Imaginary Picture of TOI-1278 b

Display orbital revolution of TOI-1278 b around the hoststar TOI-1278
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Exoplanet Name : TOI-1278 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.0900 (Rjup) 12.2178 (Rearth)
Mass (Mjup / Me): 18.5000 (Mjup) 5881.8530 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0950 (AU) 0.0950 (AU Est.)
Eccentricity : 0.0130
Orbital Period(Yrs) 0.0396
Orbital Period(Observed/Estimated) 14.48 (Days Obs.) 14.42 (Days Est.)
Surface Gravity (G Earth) 39.4028
Star Radiation at Atmospheric Boundary: 9292.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 438.2 (K)
Blackbody T 0.3(K) 411.5 (K)
Blackbody T 0.7(K) 333.0 (K)
Tidally Locked Blackbody T 0.1(K) 521.1 (K)
Tidally Locked Blackbody T 0.3(K) 489.4 (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-1278
Alternate Name :
Star Distance(LY) : 246.1
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.5 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 3799 (K)
Spectral type : MOV
UV portion[%]: 0.3
Visible portion[%]: 13.7
IR portion[%]: 86.0
Metalicity : -0.0
Absolute Magnitude: 9.1
Apparent Magnitude: 13.5
Right Ascension(RA) 320.4784
Declination (DEC) 35.6486
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TOI-1278&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-1278 b
TOI-1278 b

  • TOI-1278 b is an exoplanet orbiting the star TOI-1278, located about 246.1 light-years (75.5 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star TOI-1278 has apparent magnitude of 13.5, with absolute magnitude of 9.1.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 3799 with its spectral types of MOV
  • In this planetary system, the extrasolar planet TOI-1278 b orbits around the star TOI-1278 every 14.5 days with its orbital distance of 0.10 AU ( 14211797.7 km)
  • (Projected orbit of TOI-1278 b around its host star TOI-1278)


  • The Star TOI-1278 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.179 AU ( 26801019.9 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.248 AU ( 37046013.5 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.377 AU ( 56449926.3 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.555 AU ( 83068539.4 km)
  • Radiation at Planetary Boundary of TOI-1278 b : 9292.74 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star TOI-1278)



  • Kopparapu Recent Venus for Star TOI-1278 distance : 0.202 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star TOI-1278 distance : 0.255 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star TOI-1278 distance : 0.246 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star TOI-1278 distance : 0.271 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1278 distance : 0.489 AU
  • Kopparapu Outer Boundary for Early Mars for Star TOI-1278 distance : 0.516 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star TOI-1278)



  • Original Kopparapu Recent Venus for Star TOI-1278 distance : 0.199 AU
  • Original Kopparapu Runaway Greenhouse for Star TOI-1278 distance : 0.264 AU
  • Original Kopparapu Moist Greenhouse for Star TOI-1278 distance : 0.264 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star TOI-1278 distance : 0.497 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star TOI-1278 distance : 0.517 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star TOI-1278)



    (Position in Stellar Map of star TOI-1278 and its Exoplanet TOI-1278 b)



    (Zoomed position in Stellar Map of star TOI-1278 and its Exoplanet TOI-1278 b (zoom level 3))

    (Synthetic Spectrum of star TOI-1278*)
    *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