Imaginary Picture of K2-249 b

Display orbital revolution of K2-249 b around the hoststar K2-249
/
Exoplanet Name : K2-249 b
Alternate Name : "2MASS J12132801-0859425 b, EPIC 228748383 b, EPIC 228748383.01, TYC 5519-433-1 b, WISE J121328.01-085942.7 b"
Status : Confirmed
Radius (Rjup / Re): 0.2490 (Rjup) 2.7910 (Rearth)
Mass (Mjup / Me): 0.0216 (Mjup) 6.8529 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.1151 (AU) 0.1151 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0340
Orbital Period(Observed/Estimated) 12.41 (Days Obs.) 12.41 (Days Est.)
Surface Gravity (G Earth) 0.8797
Star Radiation at Atmospheric Boundary: 408296.4 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1128.2 (K)
Blackbody T 0.3(K) 1059.5 (K)
Blackbody T 0.7(K) 857.2 (K)
Tidally Locked Blackbody T 0.1(K) 1341.7 (K)
Tidally Locked Blackbody T 0.3(K) 1260.0 (K)
Size Class: sub-Neptune-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : K2-249
Alternate Name : "2MASS J12132801-0859425, EPIC 228748383, TYC 5519-433-1, WISE J121328.01-085942.7"
Star Distance(LY) : 1717.2
Stellar Radius(Rsun) : 1.6 (Rsun Measured)
Stellar Mass(Msun) : 1.3 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 6504 (K)
Spectral type : F6
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : 0.0
Absolute Magnitude: 2.7
Apparent Magnitude: 11.3
Right Ascension(RA) 183.3667
Declination (DEC) -8.9951
Hubble Space Telescope Guide Star Catalog (GSC) ID
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=K2-249+&submit=SIMBAD+search
Open Exoplanet Database Link
K2-249 b
K2-249 b
  • K2-249 b is an exoplanet orbiting the star K2-249, located about 1717.2 light-years (526.5 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star K2-249 has apparent magnitude of 11.3, with absolute magnitude of 2.7.
  • It is 1.3 times more massive and 1.6 times bigger compared with our Sun. The surface temperature is 6504 with its spectral types of F6
  • In this planetary system, the extrasolar planet K2-249 b orbits around the star K2-249 every 12.4 days with its orbital distance of 0.12 AU ( 17218714.9 km)
    • (Projected orbit of K2-249 b around its host star K2-249)


  • The Star K2-249 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.439 AU ( 215237941.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.989 AU ( 297515083.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.030 AU ( 453347147.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.459 AU ( 667120187.5 km)
  • Radiation at Planetary Boundary of K2-249 b : 408296.44 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star K2-249)



  • Kopparapu Recent Venus for Star K2-249 distance : 1.427 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star K2-249 distance : 1.808 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star K2-249 distance : 1.746 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star K2-249 distance : 1.913 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-249 distance : 3.145 AU
  • Kopparapu Outer Boundary for Early Mars for Star K2-249 distance : 3.317 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star K2-249)



  • Original Kopparapu Recent Venus for Star K2-249 distance : 1.452 AU
  • Original Kopparapu Runaway Greenhouse for Star K2-249 distance : 1.853 AU
  • Original Kopparapu Moist Greenhouse for Star K2-249 distance : 1.921 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star K2-249 distance : 3.202 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star K2-249 distance : 3.330 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star K2-249)



    (Position in Stellar Map of star K2-249 and its Exoplanet K2-249 b)



    (Zoomed position in Stellar Map of star K2-249 and its Exoplanet K2-249 b (zoom level 3))

    (Synthetic Spectrum of star K2-249*)
    *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