Imaginary Picture of NGTS-27 b

Display orbital revolution of NGTS-27 b around the hoststar NGTS-27
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Exoplanet Name : NGTS-27 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.3960 (Rjup) 15.6478 (Rearth)
Mass (Mjup / Me): 0.5930 (Mjup) 188.5372 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0446 (AU) 0.0446 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0092
Orbital Period(Observed/Estimated) 3.37 (Days Obs.) 3.33 (Days Est.)
Surface Gravity (G Earth) 0.7700
Star Radiation at Atmospheric Boundary: 2038830.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1686.5 (K)
Blackbody T 0.3(K) 1583.8 (K)
Blackbody T 0.7(K) 1281.5 (K)
Tidally Locked Blackbody T 0.1(K) 2005.6 (K)
Tidally Locked Blackbody T 0.3(K) 1883.5 (K)
Size Class: Super-Jupiter-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 : NGTS-27
Alternate Name :
Star Distance(LY) : 3186.5
Stellar Radius(Rsun) : 1.8 (Rsun Measured)
Stellar Mass(Msun) : 1.1 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 7.9 (GY)
Temperature : 5700 (K)
Spectral type : G4
UV portion[%]: 7.6
Visible portion[%]: 44.4
IR portion[%]: 48.0
Metalicity : 0.0
Absolute Magnitude: 3.6
Apparent Magnitude: 13.5
Right Ascension(RA) 206.0263
Declination (DEC) -32.5230
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
NGTS-27 b
NGTS-27 b

  • NGTS-27 b is an exoplanet orbiting the star NGTS-27, located about 3186.5 light-years (977.0 pc) away from Solar System. Its discovery was publicly announced on 2024.
  • The host star NGTS-27 has apparent magnitude of 13.5, with absolute magnitude of 3.6.
  • It is 1.1 times more massive and 1.8 times bigger compared with our Sun. The surface temperature is 5700 with its spectral types of G4
  • In this planetary system, the extrasolar planet NGTS-27 b orbits around the star NGTS-27 every 3.4 days with its orbital distance of 0.04 AU ( 6672065.0 km)
  • (Projected orbit of NGTS-27 b around its host star NGTS-27)


  • The Star NGTS-27 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.246 AU ( 186372182.1 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.722 AU ( 257615060.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 2.624 AU ( 392548342.2 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 3.861 AU ( 577652082.0 km)
  • Radiation at Planetary Boundary of NGTS-27 b : 2038830.16 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NGTS-27)



  • Kopparapu Recent Venus for Star NGTS-27 distance : 1.297 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star NGTS-27 distance : 1.643 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star NGTS-27 distance : 1.587 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star NGTS-27 distance : 1.740 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-27 distance : 2.907 AU
  • Kopparapu Outer Boundary for Early Mars for Star NGTS-27 distance : 3.066 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NGTS-27)



  • Original Kopparapu Recent Venus for Star NGTS-27 distance : 1.297 AU
  • Original Kopparapu Runaway Greenhouse for Star NGTS-27 distance : 1.689 AU
  • Original Kopparapu Moist Greenhouse for Star NGTS-27 distance : 1.716 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-27 distance : 2.958 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NGTS-27 distance : 3.076 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star NGTS-27)



    (Position in Stellar Map of star NGTS-27 and its Exoplanet NGTS-27 b)



    (Zoomed position in Stellar Map of star NGTS-27 and its Exoplanet NGTS-27 b (zoom level 3))

    (Synthetic Spectrum of star NGTS-27*)
    *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