Imaginary Picture of LP 791-18 c

Display orbital revolution of LP 791-18 c around the hoststar LP 791-18
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Exoplanet Name : LP 791-18 c
Alternate Name : TOI-736.01
Radius (Rjup / Re): 0.2061 (Rjup) 2.3102 (Rearth)
Mass (Mjup / Me): 0.0181 (Mjup) 5.7478 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0294 (AU) 0.0294 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0137
Orbital Period(Observed/Estimated) 4.99 (Days Obs.) 4.94 (Days Est.)
Surface Gravity (G Earth) 1.0770
Star Radiation at Atmospheric Boundary: 54932.6 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 683.3 (K)
Blackbody T 0.3(K) 641.7 (K)
Blackbody T 0.7(K) 519.2 (K)
Tidally Locked Blackbody T 0.1(K) 812.6 (K)
Tidally Locked Blackbody T 0.3(K) 763.1 (K)
Size Class: sub-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 : LP 791-18
Alternate Name :
Star Distance(LY) : 86.5
Stellar Radius(Rsun) : 0.7 (Rsun Measured)
Stellar Mass(Msun) : 0.1 (Msun Measured) 0.1 (Msun Estimated)
Star Age : 0.5 (GY)
Temperature : 2960 (K)
Spectral type : M6V
UV portion[%]: 0.1
Visible portion[%]: 3.2
IR portion[%]: 96.7
Metalicity : -0.1
Absolute Magnitude: 14.8
Apparent Magnitude: 16.9
Right Ascension(RA) 165.6915
Declination (DEC) -16.4061
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=LP+791-18+&submit=SIMBAD+search
Open Exoplanet Database Link
LP 791-18 c
LP 791-18 c

  • LP 791-18 c is an exoplanet orbiting the star LP 791-18, located about 86.5 light-years (26.5 pc) away from Solar System. Its discovery was publicly announced on 2019.
  • The host star LP 791-18 has apparent magnitude of 16.9, with absolute magnitude of 14.8.
  • It is 0.1 times more massive and 0.7 times bigger compared with our Sun. The surface temperature is 2960 with its spectral types of M6V
  • In this planetary system, the extrasolar planet LP 791-18 c orbits around the star LP 791-18 every 5.0 days with its orbital distance of 0.03 AU ( 4396980.6 km)
  • (Projected orbit of LP 791-18 c around its host star LP 791-18)


  • The Star LP 791-18 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.135 AU ( 20160434.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.186 AU ( 27866988.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.284 AU ( 42463123.9 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.418 AU ( 62486347.0 km)
  • Radiation at Planetary Boundary of LP 791-18 c : 54932.59 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star LP 791-18)



  • Kopparapu Recent Venus for Star LP 791-18 distance : 0.153 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star LP 791-18 distance : 0.194 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star LP 791-18 distance : 0.187 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star LP 791-18 distance : 0.206 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star LP 791-18 distance : 0.387 AU
  • Kopparapu Outer Boundary for Early Mars for Star LP 791-18 distance : 0.408 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star LP 791-18)



  • Original Kopparapu Recent Venus for Star LP 791-18 distance : 0.153 AU
  • Original Kopparapu Runaway Greenhouse for Star LP 791-18 distance : 0.201 AU
  • Original Kopparapu Moist Greenhouse for Star LP 791-18 distance : 0.202 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star LP 791-18 distance : 0.393 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star LP 791-18 distance : 0.409 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star LP 791-18)



    (Position in Stellar Map of star LP 791-18 and its Exoplanet LP 791-18 c)



    (Zoomed position in Stellar Map of star LP 791-18 and its Exoplanet LP 791-18 c (zoom level 3))

    (Synthetic Spectrum of star LP 791-18*)
    *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