Imaginary Picture of HD 27894 c

Display orbital revolution of HD 27894 c around the hoststar HD 27894
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Exoplanet Name : HD 27894 c
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 0.1620 (Mjup) 51.5060 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1980 (AU) 0.1980 (AU Est.)
Eccentricity : 0.0150
Orbital Period(Yrs) 0.0988
Orbital Period(Observed/Estimated) 36.07 (Days Obs.) 35.98 (Days Est.)
Surface Gravity (G Earth) 0.4974
Star Radiation at Atmospheric Boundary: 8290.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 425.9 (K)
Blackbody T 0.3(K) 399.9 (K)
Blackbody T 0.7(K) 323.6 (K)
Tidally Locked Blackbody T 0.1(K) 506.5 (K)
Tidally Locked Blackbody T 0.3(K) 475.6 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HD 27894
Alternate Name :
Star Distance(LY) : 138.2
Stellar Radius(Rsun) : 0.7 (Rsun Estimated)
Stellar Mass(Msun) : 0.8 (Msun Measured) 0.8 (Msun Estimated)
Star Age : 3.9 (GY)
Temperature : 4875 (K)
Spectral type : K2 V
UV portion[%]: 2.7
Visible portion[%]: 35.9
IR portion[%]: 61.4
Metalicity : 0.3
Absolute Magnitude: 6.2
Apparent Magnitude: 9.4
Right Ascension(RA) 65.1960
Declination (DEC) -59.4108
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors 0
Discovery Paper - Title
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+27894+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HD%2027894%20b/
HD 27894 c
HD 27894 c

  • HD 27894 c is an exoplanet orbiting the star HD 27894, located about 138.2 light-years (42.4 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star HD 27894 has apparent magnitude of 9.4, with absolute magnitude of 6.2.
  • It is 0.8 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 4875 with its spectral types of K2 V
  • In this planetary system, the extrasolar planet HD 27894 c orbits around the star HD 27894 every 36.1 days with its orbital distance of 0.20 AU ( 29620378.4 km)
  • (Projected orbit of HD 27894 c around its host star HD 27894)


  • The Star HD 27894 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.353 AU ( 52760365.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.487 AU ( 72928612.3 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.743 AU ( 111127066.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.093 AU ( 163528346.0 km)
  • Radiation at Planetary Boundary of HD 27894 c : 8290.37 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HD 27894)



  • Kopparapu Recent Venus for Star HD 27894 distance : 0.384 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HD 27894 distance : 0.486 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HD 27894 distance : 0.469 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HD 27894 distance : 0.515 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 27894 distance : 0.885 AU
  • Kopparapu Outer Boundary for Early Mars for Star HD 27894 distance : 0.934 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HD 27894)



  • Original Kopparapu Recent Venus for Star HD 27894 distance : 0.379 AU
  • Original Kopparapu Runaway Greenhouse for Star HD 27894 distance : 0.501 AU
  • Original Kopparapu Moist Greenhouse for Star HD 27894 distance : 0.502 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HD 27894 distance : 0.900 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HD 27894 distance : 0.936 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HD 27894)



    (Position in Stellar Map of star HD 27894 and its Exoplanet HD 27894 c)



    (Zoomed position in Stellar Map of star HD 27894 and its Exoplanet HD 27894 c (zoom level 3))

    (Synthetic Spectrum of star HD 27894*)
    *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