Imaginary Picture of TOI-282.03

Display orbital revolution of TOI-282.03 around the hoststar HD 28109
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Exoplanet Name : TOI-282.03
Alternate Name : HD 28109 d
Status : Confirmed
Radius (Rjup / Re): 0.2899 (Rjup) 3.2495 (Rearth)
Mass (Mjup / Me): 0.0248 (Mjup) 7.8941 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.4110 (AU) 0.4110 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.2307
Orbital Period(Observed/Estimated) 84.26 (Days Obs.) 85.74 (Days Est.)
Surface Gravity (G Earth) 0.7476
Star Radiation at Atmospheric Boundary: 21294.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 539.1 (K)
Blackbody T 0.3(K) 506.3 (K)
Blackbody T 0.7(K) 409.7 (K)
Tidally Locked Blackbody T 0.1(K) 641.2 (K)
Tidally Locked Blackbody T 0.3(K) 602.1 (K)
Size Class: Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection : Primary Transit
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 28109
Alternate Name :
Star Distance(LY) : 456.9
Stellar Radius(Rsun) : 1.4 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 1.1 (GY)
Temperature : 6120 (K)
Spectral type : F8
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 3.7
Apparent Magnitude: 9.4
Right Ascension(RA) 65.2375
Declination (DEC) -68.1028
Hubble Space Telescope Guide Star Catalog (GSC) ID 09154-01248
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=HD+28109&submit=SIMBAD+search
Open Exoplanet Database Link
TOI-282.03
TOI-282.03

  • TOI-282.03 is an exoplanet orbiting the star HD 28109, located about 456.9 light-years (140.1 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star HD 28109 has apparent magnitude of 9.4, with absolute magnitude of 3.7.
  • It is 1.3 times more massive and 1.4 times bigger compared with our Sun. The surface temperature is 6120 with its spectral types of F8
  • In this planetary system, the extrasolar planet TOI-282.03 orbits around the star HD 28109 every 84.3 days with its orbital distance of 0.41 AU ( 61484724.9 km)
  • (Projected orbit of TOI-282.03 around its host star HD 28109)


  • The Star HD 28109 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.173 AU ( 175521066.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.622 AU ( 242615983.4 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.471 AU ( 369693067.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.637 AU ( 544019544.6 km)
  • Radiation at Planetary Boundary of TOI-282.03 : 21294.30 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 28109)



  • Kopparapu Recent Venus for Star HD 28109 distance : 1.191 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 28109 distance : 1.508 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 28109 distance : 1.457 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 28109 distance : 1.597 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 28109 distance : 2.642 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 28109 distance : 2.787 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 28109)



  • Original Kopparapu Recent Venus for Star HD 28109 distance : 1.201 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 28109 distance : 1.548 AU
  • Original Kopparapu Moist Greenhouse for Star HD 28109 distance : 1.589 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 28109 distance : 2.689 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 28109 distance : 2.797 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 28109)



    (Position in Stellar Map of star HD 28109 and its Exoplanet TOI-282.03)



    (Zoomed position in Stellar Map of star HD 28109 and its Exoplanet TOI-282.03 (zoom level 3))

    (Synthetic Spectrum of star HD 28109*)
    *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