Imaginary Picture of NGTS-29 b

Display orbital revolution of NGTS-29 b around the hoststar NGTS-29
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Exoplanet Name : NGTS-29 b
Alternate Name : TOI-2447 b
Status : Confirmed
Radius (Rjup / Re): 0.8570 (Rjup) 9.6061 (Rearth)
Mass (Mjup / Me): 0.3900 (Mjup) 123.9958 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.3470 (AU) 0.3470 (AU Est.)
Eccentricity : 0.1700
Orbital Period(Yrs) 0.1898
Orbital Period(Observed/Estimated) 69.34 (Days Obs.) 73.42 (Days Est.)
Surface Gravity (G Earth) 1.3437
Star Radiation at Atmospheric Boundary: 11111.2 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 458.2 (K)
Blackbody T 0.3(K) 430.3 (K)
Blackbody T 0.7(K) 348.2 (K)
Tidally Locked Blackbody T 0.1(K) 544.9 (K)
Tidally Locked Blackbody T 0.3(K) 511.7 (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-29
Alternate Name : TOI-2447
Star Distance(LY) : 487.3
Stellar Radius(Rsun) : 1.0 (Rsun Measured)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.2 (Msun Estimated)
Star Age : 2.1 (GY)
Temperature : 5730 (K)
Spectral type : G3
UV portion[%]: 7.7
Visible portion[%]: 44.5
IR portion[%]: 47.7
Metalicity : 0.2
Absolute Magnitude: 4.1
Apparent Magnitude: 10.0
Right Ascension(RA) 70.9975
Declination (DEC) -39.9067
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-29 b
NGTS-29 b

  • NGTS-29 b is an exoplanet orbiting the star NGTS-29, located about 487.3 light-years (149.4 pc) away from Solar System. Its discovery was publicly announced on 2024.
  • The host star NGTS-29 has apparent magnitude of 10.0, with absolute magnitude of 4.1.
  • It is 1.0 times more massive and 1.0 times bigger compared with our Sun. The surface temperature is 5730 with its spectral types of G3
  • In this planetary system, the extrasolar planet NGTS-29 b orbits around the star NGTS-29 every 69.3 days with its orbital distance of 0.35 AU ( 51910461.1 km)
  • (Projected orbit of NGTS-29 b around its host star NGTS-29)


  • The Star NGTS-29 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.716 AU ( 107044741.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.989 AU ( 147963806.7 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.507 AU ( 225464097.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.218 AU ( 331780295.8 km)
  • Radiation at Planetary Boundary of NGTS-29 b : 11111.18 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NGTS-29)



  • Kopparapu Recent Venus for Star NGTS-29 distance : 0.744 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star NGTS-29 distance : 0.942 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star NGTS-29 distance : 0.910 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star NGTS-29 distance : 0.997 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-29 distance : 1.665 AU
  • Kopparapu Outer Boundary for Early Mars for Star NGTS-29 distance : 1.757 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NGTS-29)



  • Original Kopparapu Recent Venus for Star NGTS-29 distance : 0.744 AU
  • Original Kopparapu Runaway Greenhouse for Star NGTS-29 distance : 0.968 AU
  • Original Kopparapu Moist Greenhouse for Star NGTS-29 distance : 0.984 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NGTS-29 distance : 1.695 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NGTS-29 distance : 1.762 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star NGTS-29)



    (Position in Stellar Map of star NGTS-29 and its Exoplanet NGTS-29 b)



    (Zoomed position in Stellar Map of star NGTS-29 and its Exoplanet NGTS-29 b (zoom level 3))

    (Synthetic Spectrum of star NGTS-29*)
    *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