Imaginary Picture of HAT-P-54 b

Display orbital revolution of HAT-P-54 b around the hoststar HAT-P-54
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Exoplanet Name : HAT-P-54 b
Alternate Name :
Status : Confirmed
Radius (Rjup / Re): 0.9440 (Rjup) 10.5813 (Rearth)
Mass (Mjup / Me): 0.7600 (Mjup) 241.6329 (Mearth)
Semi Major Axis / Orbital Distance Calculated 0.0412 (AU) 0.0412 (AU Est.)
Eccentricity : 0.0740
Orbital Period(Yrs) 0.0104
Orbital Period(Observed/Estimated) 3.80 (Days Obs.) 3.80 (Days Est.)
Surface Gravity (G Earth) 2.1581
Star Radiation at Atmospheric Boundary: 102299.0 (W/m2)
Measured Temperature (K) 0.0 (K)
Blackbody T 0.1(K) 798.2 (K)
Blackbody T 0.3(K) 749.6 (K)
Blackbody T 0.7(K) 606.5 (K)
Tidally Locked Blackbody T 0.1(K) 949.2 (K)
Tidally Locked Blackbody T 0.3(K) 891.4 (K)
Size Class: Jupiter-size
Mass Class:
Detection Type : Primary Transit
Mass Detection :
Radius Detection :
Habitability by Solar Eq. Astronomical Unit: Not habitable
Habitability by Kopparapu: Not habitable
Star Name : HAT-P-54
Alternate Name :
Star Distance(LY) : 442.9
Stellar Radius(Rsun) : 0.6 (Rsun Measured)
Stellar Mass(Msun) : 0.6 (Msun Measured) 0.6 (Msun Estimated)
Star Age : 3.9 (GY)
Temperature : 4390 (K)
Spectral type : K
UV portion[%]: 1.2
Visible portion[%]: 29.2
IR portion[%]: 69.6
Metalicity : -0.1
Absolute Magnitude: 7.8
Apparent Magnitude: 13.5
Right Ascension(RA) 99.8980
Declination (DEC) 25.4825
Hubble Space Telescope Guide Star Catalog (GSC) ID 01884-00168
Discovered by
Discovery Paper - Authors "G._.Bakos (1,9,10), J.D.Hartman (1), W.Bhatti (1), A.Bieryla (2), M.de Val-Borro (1), D.W.Latham (2), L.A.Buchhave (2,3), Z.Csubry (1), K.Penev (1), G.Kov_cs (4,5), B.B_ky (2), E.Falco (2), T.Kov_cs (4), A.W.Howard (6), J.A.Johnson (2,9,10), H.Isaacson (7), G.W.Marcy (7), G.Torres (2), R.W.Noyes (2), P.Berlind (2), M.L.Calkins (2), G.A.Esquerdo (2), J.L_z_r (8), I.Papp (8), P.S_ri (8) ((1) Princeton University, (2) Harvard-Smithsonian Center for Astrophysics (3) University of Copenhagen, (4) Konkoly Observatory, (5) University of North Dakota, (6) IfA, Hawaii, (7) UCB, (8) Hungarian Astronomical Association, (9) Sloan Fellow, (10) Packard Fellow)"
Discovery Paper - Title HAT-P-54b: A hot jupiter transiting a 0.64 Msun star in field 0 of the K2 mission
Discovery Paper - Journal 0
Discovery Paper - URL 0
SIMBAD LINK http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HAT-P-54+&submit=SIMBAD+search
Open Exoplanet Database Link http://www.openexoplanetcatalogue.com/planet/HAT-P-54%20b/
HAT-P-54 b
HAT-P-54 b
  • HAT-P-54 b is an exoplanet orbiting the star HAT-P-54, located about 442.9 light-years (135.8 pc) away from Solar System. Its discovery was publicly announced on 2014.
  • The host star HAT-P-54 has apparent magnitude of 13.5, with absolute magnitude of 7.8.
  • It is 0.6 times more massive and 0.6 times bigger compared with our Sun. The surface temperature is 4390 with its spectral types of K
  • In this planetary system, the extrasolar planet HAT-P-54 b orbits around the star HAT-P-54 every 3.8 days with its orbital distance of 0.04 AU ( 6158944.3 km)
    • (Projected orbit of HAT-P-54 b around its host star HAT-P-54)


  • The Star HAT-P-54 's habitable zone is located at the following distance
  • Inner Boundary (the orbital distance at Venus's Equivalent Radiation ) : 0.258 AU ( 38536504.3 km)
  • Earth Boundary (the orbital distance at Earth's Equivalent Radiation) : 0.356 AU ( 53267519.8 km)
  • Outer Boundary (the orbital distance at Mars's Equivalent Radiation) : 0.543 AU ( 81167912.1 km)
  • Snow Line (the orbital distance at Snow Line Equivalent Radiation) : 0.798 AU ( 119442138.3 km)
  • Radiation at Planetary Boundary of HAT-P-54 b : 102299.02 W/m2

    (Habitable zone calculated based on SEAU(Solar Equivalent Astronomical Unit) around the star HAT-P-54)



  • Kopparapu Recent Venus for Star HAT-P-54 distance : 0.286 AU
  • Kopparapu Runaway Greenhouse for Earth-sized planet for Star HAT-P-54 distance : 0.361 AU
  • Kopparapu Runaway Greenhouse for Super-Earth-sized planet for Star HAT-P-54 distance : 0.349 AU
  • Kopparapu Runaway Greenhouse for Mars-sized planet for Star HAT-P-54 distance : 0.384 AU
  • Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-54 distance : 0.673 AU
  • Kopparapu Outer Boundary for Early Mars for Star HAT-P-54 distance : 0.710 AU

    (Habitable zone calculated based on Kopparapu et al.(2013) around the star HAT-P-54)



  • Original Kopparapu Recent Venus for Star HAT-P-54 distance : 0.282 AU
  • Original Kopparapu Runaway Greenhouse for Star HAT-P-54 distance : 0.373 AU
  • Original Kopparapu Moist Greenhouse for Star HAT-P-54 distance : 0.373 AU
  • Original Kopparapu Outer Boundary for Maximum Greenhouse for Star HAT-P-54 distance : 0.684 AU
  • Original Kopparapu Outer Boundary for Early Mars for Star HAT-P-54 distance : 0.711 AU

    (Habitable zone calculated based on Kopparapu et al.(Original) around the star HAT-P-54)



    (Position in Stellar Map of star HAT-P-54 and its Exoplanet HAT-P-54 b)



    (Zoomed position in Stellar Map of star HAT-P-54 and its Exoplanet HAT-P-54 b (zoom level 3))

    (Synthetic Spectrum of star HAT-P-54*)
    *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