Imaginary Picture of Kepler-549 d

Display orbital revolution of Kepler-549 d around the hoststar Kepler-549
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Exoplanet Name : Kepler-549 d
Alternate Name : "KOI-427 d, KOI-427.01"
Status : Confirmed
Radius (Rjup / Re): 0.4056 (Rjup) 4.5460 (Rearth)
Mass (Mjup / Me): 0.0654 (Mjup) 20.7907 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1575 (AU) 0.1575 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0674
Orbital Period(Observed/Estimated) 24.61 (Days Obs.) 24.07 (Days Est.)
Surface Gravity (G Earth) 1.0060
Star Radiation at Atmospheric Boundary: 27064.3 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 572.5 (K)
Blackbody T 0.3(K) 537.6 (K)
Blackbody T 0.7(K) 435.0 (K)
Tidally Locked Blackbody T 0.1(K) 680.8 (K)
Tidally Locked Blackbody T 0.3(K) 639.3 (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 : Kepler-549
Alternate Name : "2MASS J18520546+4715400, KIC 10189546, KOI-427"
Star Distance(LY) : 2071.6
Stellar Radius(Rsun) : 0.8 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 0.9 (Msun Estimated)
Star Age : 4.6 (GY)
Temperature : 5259 (K)
Spectral type : G8V
UV portion[%]: 5.5
Visible portion[%]: 40.9
IR portion[%]: 53.6
Metalicity : -0.0
Absolute Magnitude: 5.8
Apparent Magnitude: 14.8
Right Ascension(RA) 283.0228
Declination (DEC) 47.2611
Hubble Space Telescope Guide Star Catalog (GSC) ID
Discovered by
Discovery Paper - Authors
Discovery Paper - Title
Discovery Paper - Journal
Discovery Paper - URL
SIMBAD LINK
Open Exoplanet Database Link
Kepler-549 d
Kepler-549 d

  • Kepler-549 d is an exoplanet orbiting the star Kepler-549, located about 2071.6 light-years (635.1 pc) away from Solar System. Its discovery was publicly announced on 2017.
  • The host star Kepler-549 has apparent magnitude of 14.8, with absolute magnitude of 5.8.
  • It is 0.9 times more massive and 0.8 times bigger compared with our Sun. The surface temperature is 5259 with its spectral types of G8V
  • In this planetary system, the extrasolar planet Kepler-549 d orbits around the star Kepler-549 every 24.6 days with its orbital distance of 0.16 AU ( 23561664.6 km)
  • (Projected orbit of Kepler-549 d around its host star Kepler-549)


  • The Star Kepler-549 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.507 AU ( 75828910.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.701 AU ( 104815371.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.068 AU ( 159715429.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.571 AU ( 235028251.7 km)
  • Radiation at Planetary Boundary of Kepler-549 d : 27064.32 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star Kepler-549)



  • Kopparapu Recent Venus for Star Kepler-549 distance : 0.541 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star Kepler-549 distance : 0.685 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star Kepler-549 distance : 0.662 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star Kepler-549 distance : 0.726 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-549 distance : 1.230 AU
  • Kopparapu Outer Boundary for Early Mars for Star Kepler-549 distance : 1.297 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star Kepler-549)



  • Original Kopparapu Recent Venus for Star Kepler-549 distance : 0.537 AU
  • Original Kopparapu Runaway Greenhouse for Star Kepler-549 distance : 0.705 AU
  • Original Kopparapu Moist Greenhouse for Star Kepler-549 distance : 0.711 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star Kepler-549 distance : 1.251 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star Kepler-549 distance : 1.301 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star Kepler-549)



    (Position in Stellar Map of star Kepler-549 and its Exoplanet Kepler-549 d)



    (Zoomed position in Stellar Map of star Kepler-549 and its Exoplanet Kepler-549 d (zoom level 3))

    (Synthetic Spectrum of star Kepler-549*)
    *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