Imaginary Picture of HD 25723 c

Display orbital revolution of HD 25723 c around the hoststar HD 25723
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Exoplanet Name : HD 25723 c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 1.3300 (Mjup) 422.8575 (Mearth)
Semi Major Axis / Orbital Distance Calculated 4.3500 (AU) 4.3500 (AU Est.)
Eccentricity : 0.2200
Orbital Period(Yrs) 6.4881
Orbital Period(Observed/Estimated) 2369.84 (Days Obs.) 2275.92 (Days Est.)
Surface Gravity (G Earth) 4.0837
Star Radiation at Atmospheric Boundary: 6331.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 398.1 (K)
Blackbody T 0.3(K) 373.9 (K)
Blackbody T 0.7(K) 302.5 (K)
Tidally Locked Blackbody T 0.1(K) 473.4 (K)
Tidally Locked Blackbody T 0.3(K) 444.6 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 25723
Alternate Name :
Star Distance(LY) : 375.6
Stellar Radius(Rsun) : 13.8 (Rsun Measured)
Stellar Mass(Msun) : 2.1 (Msun Measured) 2.0 (Msun Estimated)
Star Age : 0.9 (GY)
Temperature : 4766 (K)
Spectral type : K1 III
UV portion[%]: 2.3
Visible portion[%]: 35.1
IR portion[%]: 62.5
Metalicity : -0.0
Absolute Magnitude: 0.3
Apparent Magnitude: 5.6
Right Ascension(RA) 61.0946
Declination (DEC) -12.7950
Hubble Space Telescope Guide Star Catalog (GSC) ID 05311-00364
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+25723+&submit=SIMBAD+search
Open Exoplanet Database Link
HD 25723 c
HD 25723 c

  • HD 25723 c is an exoplanet orbiting the star HD 25723, located about 375.6 light-years (115.2 pc) away from Solar System. Its discovery was publicly announced on 2020.
  • The host star HD 25723 has apparent magnitude of 5.6, with absolute magnitude of 0.3.
  • It is 2.1 times more massive and 13.8 times bigger compared with our Sun. The surface temperature is 4766 with its spectral types of K1 III
  • In this planetary system, the extrasolar planet HD 25723 c orbits around the star HD 25723 every 2369.8 days with its orbital distance of 4.35 AU ( 650750737.5 km)
  • (Projected orbit of HD 25723 c around its host star HD 25723)


  • The Star HD 25723 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 6.771 AU ( 1012942101.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 9.359 AU ( 1400150697.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 14.262 AU ( 2133519810.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 20.987 AU ( 3139567865.1 km)
  • Radiation at Planetary Boundary of HD 25723 c : 6331.10 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 25723)



  • Kopparapu Recent Venus for Star HD 25723 distance : 7.402 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 25723 distance : 9.371 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 25723 distance : 9.052 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 25723 distance : 9.937 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 25723 distance : 17.152 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 25723 distance : 18.093 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 25723)



  • Original Kopparapu Recent Venus for Star HD 25723 distance : 7.311 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 25723 distance : 9.666 AU
  • Original Kopparapu Moist Greenhouse for Star HD 25723 distance : 9.674 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 25723 distance : 17.436 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 25723 distance : 18.133 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 25723)



    (Position in Stellar Map of star HD 25723 and its Exoplanet HD 25723 c)



    (Zoomed position in Stellar Map of star HD 25723 and its Exoplanet HD 25723 c (zoom level 3))

    (Synthetic Spectrum of star HD 25723*)
    *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