Imaginary Picture of HD 63935 c

Display orbital revolution of HD 63935 c around the hoststar HD 63935
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Exoplanet Name : HD 63935 c
Alternate Name : TOI-509 c
Status : Confirmed
Radius (Rjup / Re): 0.2590 (Rjup) 2.9031 (Rearth)
Mass (Mjup / Me): 0.0349 (Mjup) 11.0960 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1480 (AU) 0.1480 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0586
Orbital Period(Observed/Estimated) 21.40 (Days Obs.) 21.53 (Days Est.)
Surface Gravity (G Earth) 1.3165
Star Radiation at Atmospheric Boundary: 48292.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 661.6 (K)
Blackbody T 0.3(K) 621.3 (K)
Blackbody T 0.7(K) 502.7 (K)
Tidally Locked Blackbody T 0.1(K) 786.8 (K)
Tidally Locked Blackbody T 0.3(K) 738.9 (K)
Size Class: sub-Neptune-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 : HD 63935
Alternate Name :
Star Distance(LY) : 159.2
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 5534 (K)
Spectral type : G7
UV portion[%]: 7.0
Visible portion[%]: 43.5
IR portion[%]: 49.5
Metalicity : 0.1
Absolute Magnitude: 5.1
Apparent Magnitude: 8.6
Right Ascension(RA) 117.9250
Declination (DEC) 9.3864
Hubble Space Telescope Guide Star Catalog (GSC) ID 00783-00536
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=HD+63935&submit=SIMBAD+search
Open Exoplanet Database Link
HD 63935 c
HD 63935 c

  • HD 63935 c is an exoplanet orbiting the star HD 63935, located about 159.2 light-years (48.8 pc) away from Solar System. Its discovery was publicly announced on 2021.
  • The host star HD 63935 has apparent magnitude of 8.6, with absolute magnitude of 5.1.
  • It is 0.9 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5534 with its spectral types of G7
  • In this planetary system, the extrasolar planet HD 63935 c orbits around the star HD 63935 every 21.4 days with its orbital distance of 0.15 AU ( 22140484.9 km)
  • (Projected orbit of HD 63935 c around its host star HD 63935)


  • The Star HD 63935 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.636 AU ( 95182044.5 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.879 AU ( 131566459.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.340 AU ( 200478168.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.972 AU ( 295012407.7 km)
  • Radiation at Planetary Boundary of HD 63935 c : 48292.00 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 63935)



  • Kopparapu Recent Venus for Star HD 63935 distance : 0.669 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 63935 distance : 0.847 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 63935 distance : 0.818 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 63935 distance : 0.897 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 63935 distance : 1.507 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 63935 distance : 1.589 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 63935)



  • Original Kopparapu Recent Venus for Star HD 63935 distance : 0.667 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 63935 distance : 0.871 AU
  • Original Kopparapu Moist Greenhouse for Star HD 63935 distance : 0.882 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 63935 distance : 1.533 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 63935 distance : 1.594 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 63935)



    (Position in Stellar Map of star HD 63935 and its Exoplanet HD 63935 c)



    (Zoomed position in Stellar Map of star HD 63935 and its Exoplanet HD 63935 c (zoom level 3))

    (Synthetic Spectrum of star HD 63935*)
    *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