Imaginary Picture of LP 415-17 b

Display orbital revolution of LP 415-17 b around the hoststar LP 415-17
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Exoplanet Name : LP 415-17 b
Alternate Name : "K2-155 b, EPIC 210897587 b"
Radius (Rjup / Re): 0.1610 (Rjup) 1.8046 (Rearth)
Mass (Mjup / Me): 0.0148 (Mjup) 4.7055 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0562 (AU) 0.0562 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0174
Orbital Period(Observed/Estimated) 6.34 (Days Obs.) 6.04 (Days Est.)
Surface Gravity (G Earth) 1.4448
Star Radiation at Atmospheric Boundary: 42934.9 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 642.5 (K)
Blackbody T 0.3(K) 603.3 (K)
Blackbody T 0.7(K) 488.2 (K)
Tidally Locked Blackbody T 0.1(K) 764.0 (K)
Tidally Locked Blackbody T 0.3(K) 717.5 (K)
Size Class: super-Earth-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 : LP 415-17
Alternate Name : "EPIC 210897587, 2MASS 04215245+21211, K2-155"
Star Distance(LY) : 267.4
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.7 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 4258 (K)
Spectral type : K6
UV portion[%]: 0.9
Visible portion[%]: 27.1
IR portion[%]: 72.0
Metalicity : -0.3
Absolute Magnitude: 8.2
Apparent Magnitude: 12.8
Right Ascension(RA) 65.4687
Declination (DEC) 21.3536
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
LP 415-17 b
LP 415-17 b

  • LP 415-17 b is an exoplanet orbiting the star LP 415-17, located about 267.4 light-years (82.0 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star LP 415-17 has apparent magnitude of 12.8, with absolute magnitude of 8.2.
  • It is 0.7 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4258 with its spectral types of K6
  • In this planetary system, the extrasolar planet LP 415-17 b orbits around the star LP 415-17 every 6.3 days with its orbital distance of 0.06 AU ( 8407400.3 km)
  • (Projected orbit of LP 415-17 b around its host star LP 415-17)


  • The Star LP 415-17 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.228 AU ( 34079830.0 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.315 AU ( 47107231.2 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.480 AU ( 71780995.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.706 AU ( 105628879.6 km)
  • Radiation at Planetary Boundary of LP 415-17 b : 42934.93 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star LP 415-17)



  • Kopparapu Recent Venus for Star LP 415-17 distance : 0.254 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star LP 415-17 distance : 0.321 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star LP 415-17 distance : 0.310 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star LP 415-17 distance : 0.341 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star LP 415-17 distance : 0.601 AU
  • Kopparapu Outer Boundary for Early Mars for Star LP 415-17 distance : 0.634 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star LP 415-17)



  • Original Kopparapu Recent Venus for Star LP 415-17 distance : 0.250 AU
  • Original Kopparapu Runaway Greenhouse for Star LP 415-17 distance : 0.332 AU
  • Original Kopparapu Moist Greenhouse for Star LP 415-17 distance : 0.331 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star LP 415-17 distance : 0.611 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star LP 415-17 distance : 0.636 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star LP 415-17)



    (Position in Stellar Map of star LP 415-17 and its Exoplanet LP 415-17 b)



    (Zoomed position in Stellar Map of star LP 415-17 and its Exoplanet LP 415-17 b (zoom level 3))