Imaginary Picture of NGTS-25 b

Display orbital revolution of NGTS-25 b around the hoststar NGTS-25
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Exoplanet Name : NGTS-25 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 1.0230 (Rjup) 11.4668 (Rearth)
Mass (Mjup / Me): 0.6390 (Mjup) 203.1624 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0388 (AU) 0.0388 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0077
Orbital Period(Observed/Estimated) 2.82 (Days Obs.) 2.93 (Days Est.)
Surface Gravity (G Earth) 1.5451
Star Radiation at Atmospheric Boundary: 482960.1 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1176.6 (K)
Blackbody T 0.3(K) 1104.9 (K)
Blackbody T 0.7(K) 894.0 (K)
Tidally Locked Blackbody T 0.1(K) 1399.2 (K)
Tidally Locked Blackbody T 0.3(K) 1314.0 (K)
Size Class: 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-25
Alternate Name :
Star Distance(LY) : 1686.2
Stellar Radius(Rsun) : 0.9 (Rsun Measured)
Stellar Mass(Msun) : 0.9 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 3.5 (GY)
Temperature : 5321 (K)
Spectral type : KOV
UV portion[%]: 5.9
Visible portion[%]: 41.7
IR portion[%]: 52.4
Metalicity : 0.1
Absolute Magnitude: 5.7
Apparent Magnitude: 14.3
Right Ascension(RA) 307.4167
Declination (DEC) -39.0322
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-25 b
NGTS-25 b

  • NGTS-25 b is an exoplanet orbiting the star NGTS-25, located about 1686.2 light-years (517.0 pc) away from Solar System. Its discovery was publicly announced on 2022.
  • The host star NGTS-25 has apparent magnitude of 14.3, with absolute magnitude of 5.7.
  • It is 0.9 times more massive and 0.9 times bigger compared with our Sun. The surface temperature is 5321 with its spectral types of KOV
  • In this planetary system, the extrasolar planet NGTS-25 b orbits around the star NGTS-25 every 2.8 days with its orbital distance of 0.04 AU ( 5804397.4 km)
  • (Projected orbit of NGTS-25 b around its host star NGTS-25)


  • The Star NGTS-25 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.527 AU ( 78912005.6 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.729 AU ( 109077014.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.111 AU ( 166209230.6 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 1.635 AU ( 244584163.9 km)
  • Radiation at Planetary Boundary of NGTS-25 b : 482960.15 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NGTS-25)



  • Kopparapu Recent Venus for Star NGTS-25 distance : 0.561 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star NGTS-25 distance : 0.711 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star NGTS-25 distance : 0.686 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star NGTS-25 distance : 0.753 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-25 distance : 1.273 AU
  • Kopparapu Outer Boundary for Early Mars for Star NGTS-25 distance : 1.343 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NGTS-25)



  • Original Kopparapu Recent Venus for Star NGTS-25 distance : 0.558 AU
  • Original Kopparapu Runaway Greenhouse for Star NGTS-25 distance : 0.732 AU
  • Original Kopparapu Moist Greenhouse for Star NGTS-25 distance : 0.738 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-25 distance : 1.295 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NGTS-25 distance : 1.346 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star NGTS-25)



    (Position in Stellar Map of star NGTS-25 and its Exoplanet NGTS-25 b)



    (Zoomed position in Stellar Map of star NGTS-25 and its Exoplanet NGTS-25 b (zoom level 3))

    (Synthetic Spectrum of star NGTS-25*)
    *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