Imaginary Picture of NGTS-2 b

Display orbital revolution of NGTS-2 b around the hoststar NGTS-2
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Exoplanet Name : NGTS-2 b
Alternate Name : "WASP-179 b, TYC 7282-1298-1 b"
Status : Confirmed
Radius (Rjup / Re): 1.5360 (Rjup) 17.2170 (Rearth)
Mass (Mjup / Me): 0.6700 (Mjup) 213.0185 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0584 (AU) 0.0584 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0124
Orbital Period(Observed/Estimated) 4.51 (Days Obs.) 4.03 (Days Est.)
Surface Gravity (G Earth) 0.7186
Star Radiation at Atmospheric Boundary: 1834264.7 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1642.5 (K)
Blackbody T 0.3(K) 1542.5 (K)
Blackbody T 0.7(K) 1248.0 (K)
Tidally Locked Blackbody T 0.1(K) 1953.3 (K)
Tidally Locked Blackbody T 0.3(K) 1834.3 (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-2
Alternate Name : "TYC 7282-1298-1, WASP-179"
Star Distance(LY) : 1174.1
Stellar Radius(Rsun) : 1.7 (Rsun Measured)
Stellar Mass(Msun) : 1.6 (Msun Measured) 1.3 (Msun Estimated)
Star Age : 2.2 (GY)
Temperature : 6478 (K)
Spectral type : F5V
UV portion[%]: 0.3
Visible portion[%]: 1.5
IR portion[%]: 98.2
Metalicity : -0.1
Absolute Magnitude: 3.2
Apparent Magnitude: 11.0
Right Ascension(RA) 215.1229
Declination (DEC) -31.2019
Hubble Space Telescope Guide Star Catalog (GSC) ID 07282-01298
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=TYC+7282-1298-1&submit=SIMBAD+search
Open Exoplanet Database Link
NGTS-2 b
NGTS-2 b

  • NGTS-2 b is an exoplanet orbiting the star NGTS-2, located about 1174.1 light-years (360.0 pc) away from Solar System. Its discovery was publicly announced on 2018.
  • The host star NGTS-2 has apparent magnitude of 11.0, with absolute magnitude of 3.2.
  • It is 1.6 times more massive and 1.7 times bigger compared with our Sun. The surface temperature is 6478 with its spectral types of F5V
  • In this planetary system, the extrasolar planet NGTS-2 b orbits around the star NGTS-2 every 4.5 days with its orbital distance of 0.06 AU ( 8736515.6 km)
  • (Projected orbit of NGTS-2 b around its host star NGTS-2)


  • The Star NGTS-2 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 1.547 AU ( 231472581.7 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 2.139 AU ( 319955599.0 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 3.259 AU ( 487541526.8 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 4.796 AU ( 717438714.5 km)
  • Radiation at Planetary Boundary of NGTS-2 b : 1834264.68 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NGTS-2)



  • Kopparapu Recent Venus for Star NGTS-2 distance : 1.537 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star NGTS-2 distance : 1.947 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star NGTS-2 distance : 1.880 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star NGTS-2 distance : 2.060 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-2 distance : 3.388 AU
  • Kopparapu Outer Boundary for Early Mars for Star NGTS-2 distance : 3.574 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NGTS-2)



  • Original Kopparapu Recent Venus for Star NGTS-2 distance : 1.563 AU
  • Original Kopparapu Runaway Greenhouse for Star NGTS-2 distance : 1.996 AU
  • Original Kopparapu Moist Greenhouse for Star NGTS-2 distance : 2.068 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-2 distance : 3.450 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NGTS-2 distance : 3.587 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star NGTS-2)



    (Position in Stellar Map of star NGTS-2 and its Exoplanet NGTS-2 b)



    (Zoomed position in Stellar Map of star NGTS-2 and its Exoplanet NGTS-2 b (zoom level 3))

    (Synthetic Spectrum of star NGTS-2*)
    *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