Imaginary Picture of NLTT 25473 b

Display orbital revolution of NLTT 25473 b around the hoststar NLTT 25473
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Exoplanet Name : NLTT 25473 b
Alternate Name : "2MASS J10501081-1404365 b, 1RXS J105010.3-140431 b, LP 731-60 b"
Status : Confirmed
Radius (Rjup / Re): 0.9078 (Rjup) 10.1759 (Rearth)
Mass (Mjup / Me): 15.0000 (Mjup) 4769.0700 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0000 (AU) 0.0256 (AU Est.)
Eccentricity : 0.0000
Orbital Period(Yrs) 0.0041
Orbital Period(Observed/Estimated) 1.48 (Days Obs.) 0.00 (Days Est.)
Surface Gravity (G Earth) 46.0565
Star Radiation at Atmospheric Boundary: 2088107.5 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 1696.6 (K)
Blackbody T 0.3(K) 1593.3 (K)
Blackbody T 0.7(K) 1289.1 (K)
Tidally Locked Blackbody T 0.1(K) 2017.6 (K)
Tidally Locked Blackbody T 0.3(K) 1894.8 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Radial Velocity
Mass Detection : Radial Velocity
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : NLTT 25473
Alternate Name : "LP 731-60, 1RXS J105010.3-140431, 2MASS J10501081-1404365"
Star Distance(LY) : 356.7
Stellar Radius(Rsun) : 0.1 (Rsun Estimated)
Stellar Mass(Msun) : 1.0 (Msun Measured) 1.0 (Msun Estimated)
Star Age : 0.0 (GY)
Temperature : 18500 (K)
Spectral type : DA
UV portion[%]: 7.8
Visible portion[%]: 44.8
IR portion[%]: 47.4
Metalicity : 0.0
Absolute Magnitude: 11.6
Apparent Magnitude: 16.8
Right Ascension(RA) 162.5450
Declination (DEC) -14.0769
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
NLTT 25473 b
NLTT 25473 b

  • NLTT 25473 b is an exoplanet orbiting the star NLTT 25473, located about 356.7 light-years (109.4 pc) away from Solar System. Its discovery was publicly announced on 2001.
  • The host star NLTT 25473 has apparent magnitude of 16.8, with absolute magnitude of 11.6.
  • It is 1.0 times more massive and 0.1 times bigger compared with our Sun. The surface temperature is 18500 with its spectral types of DA
  • In this planetary system, the extrasolar planet NLTT 25473 b orbits around the star NLTT 25473 every 1.5 days with its orbital distance of 0.03 AU ( 3827423.0 km)
  • (Projected orbit of NLTT 25473 b around its host star NLTT 25473)


  • The Star NLTT 25473 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.723 AU ( 108196493.8 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 1.000 AU ( 149555829.6 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 1.523 AU ( 227889987.7 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 2.242 AU ( 335350100.1 km)
  • Radiation at Planetary Boundary of NLTT 25473 b : 2088107.52 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star NLTT 25473)



  • Kopparapu Recent Venus for Star NLTT 25473 distance : nan AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star NLTT 25473 distance : nan AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star NLTT 25473 distance : nan AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star NLTT 25473 distance : nan AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star NLTT 25473 distance : nan AU
  • Kopparapu Outer Boundary for Early Mars for Star NLTT 25473 distance : nan AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star NLTT 25473)



  • Original Kopparapu Recent Venus for Star NLTT 25473 distance : nan AU
  • Original Kopparapu Runaway Greenhouse for Star NLTT 25473 distance : nan AU
  • Original Kopparapu Moist Greenhouse for Star NLTT 25473 distance : nan AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star NLTT 25473 distance : nan AU
  • Original Kopparapu Outer Boundary for Early Mars for Star NLTT 25473 distance : nan AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star NLTT 25473)



    (Position in Stellar Map of star NLTT 25473 and its Exoplanet NLTT 25473 b)



    (Zoomed position in Stellar Map of star NLTT 25473 and its Exoplanet NLTT 25473 b (zoom level 3))

    (Synthetic Spectrum of star NLTT 25473*)
    *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