{
  "meta": {
    "version": 1,
    "reviewed": "2026-10-14",
    "scope": "Curated educational starter catalog; not complete or a current archive snapshot",
    "constants": {
      "earth_mass_kg": 5.97217e+24,
      "earth_radius_km": 6371.0084,
      "jupiter_mass_kg": 1.89813e+27,
      "jupiter_radius_km": 71492,
      "solar_mass_kg": 1.98847e+30,
      "solar_radius_km": 695700
    }
  },
  "sources": {
    "jpl": {
      "title": "JPL Planetary Physical Parameters",
      "url": "https://ssd.jpl.nasa.gov/planets/phys_par.html"
    },
    "bennu": {
      "title": "Lauretta et al. 2019, Table 1",
      "url": "https://heliophysics.gsfc.nasa.gov/sed/content/uploadFiles/publication_files/Lauretta2019.pdf"
    },
    "eros": {
      "title": "Yeomans et al. 2000",
      "url": "https://doi.org/10.1126/science.289.5487.2085"
    },
    "agol": {
      "title": "Agol et al. 2021",
      "url": "https://doi.org/10.3847/PSJ/abd022"
    },
    "cancri": {
      "title": "Acu\u00f1a et al. 2023, Table 2",
      "url": "https://www.aanda.org/articles/aa/pdf/2023/09/aa45736-22.pdf"
    },
    "wasp": {
      "title": "Enoch et al. 2011",
      "url": "https://arxiv.org/abs/1104.2827"
    },
    "corot": {
      "title": "Deleuil et al. 2008",
      "url": "https://arxiv.org/abs/0810.0919"
    },
    "wasp30": {
      "title": "Anderson et al. 2010",
      "url": "https://arxiv.org/abs/1010.3006"
    },
    "tstar": {
      "title": "Van Grootel et al. 2018",
      "url": "https://arxiv.org/abs/1712.01911"
    },
    "hats": {
      "title": "Zhou et al. 2014",
      "url": "https://arxiv.org/abs/1310.7591"
    },
    "ogle": {
      "title": "Pont et al. 2005",
      "url": "https://doi.org/10.1051/0004-6361:200500025"
    },
    "solar-conversion": {
      "title": "Adopted solar mass and radius (atlas conversion constants)",
      "url": "https://ssd.jpl.nasa.gov/astro_par.html"
    }
  },
  "objects": [
    {
      "id": "mercury",
      "name": "Mercury",
      "category": "Solar System planets",
      "mass": 0.0552735437872666,
      "radius": 0.38289072103562133,
      "mass_error": null,
      "radius_error": null,
      "source": "jpl",
      "method": "dynamical mass / mean radius",
      "note": "Mean radius; rounded source values. Uncertainties not transcribed.",
      "original": {
        "mass": 3.3010299999999994e+23,
        "mass_unit": "kg",
        "radius": 2439.4,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "venus",
      "name": "Venus",
      "category": "Solar System planets",
      "mass": 0.8149985683595744,
      "radius": 0.949896722785674,
      "mass_error": null,
      "radius_error": null,
      "source": "jpl",
      "method": "dynamical mass / mean radius",
      "note": "Mean radius; rounded source values. Uncertainties not transcribed.",
      "original": {
        "mass": 4.867309999999999e+24,
        "mass_unit": "kg",
        "radius": 6051.8,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "earth",
      "name": "Earth",
      "category": "Solar System planets",
      "mass": 1.0,
      "radius": 1.0,
      "mass_error": null,
      "radius_error": null,
      "source": "jpl",
      "method": "dynamical mass / mean radius",
      "note": "Mean radius; rounded source values. Uncertainties not transcribed.",
      "original": {
        "mass": 5.97217e+24,
        "mass_unit": "kg",
        "radius": 6371.0084,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "mars",
      "name": "Mars",
      "category": "Solar System planets",
      "mass": 0.10744687441918098,
      "radius": 0.532019389583602,
      "mass_error": null,
      "radius_error": null,
      "source": "jpl",
      "method": "dynamical mass / mean radius",
      "note": "Mean radius; rounded source values. Uncertainties not transcribed.",
      "original": {
        "mass": 6.41691e+23,
        "mass_unit": "kg",
        "radius": 3389.5,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "jupiter",
      "name": "Jupiter",
      "category": "Solar System planets",
      "mass": 317.82836054566434,
      "radius": 10.973302122784833,
      "mass_error": null,
      "radius_error": null,
      "source": "jpl",
      "method": "dynamical mass / mean radius",
      "note": "Mean radius; rounded source values. Uncertainties not transcribed.",
      "original": {
        "mass": 1.898125e+27,
        "mass_unit": "kg",
        "radius": 69911,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "saturn",
      "name": "Saturn",
      "category": "Solar System planets",
      "mass": 95.16088791846181,
      "radius": 9.140154327845496,
      "mass_error": null,
      "radius_error": null,
      "source": "jpl",
      "method": "dynamical mass / mean radius",
      "note": "Mean radius; rounded source values. Uncertainties not transcribed.",
      "original": {
        "mass": 5.68317e+26,
        "mass_unit": "kg",
        "radius": 58232,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "uranus",
      "name": "Uranus",
      "category": "Solar System planets",
      "mass": 14.53573826599042,
      "radius": 3.9808454812271163,
      "mass_error": null,
      "radius_error": null,
      "source": "jpl",
      "method": "dynamical mass / mean radius",
      "note": "Mean radius; rounded source values. Uncertainties not transcribed.",
      "original": {
        "mass": 8.68099e+25,
        "mass_unit": "kg",
        "radius": 25362,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "neptune",
      "name": "Neptune",
      "category": "Solar System planets",
      "mass": 17.14773691974609,
      "radius": 3.8646943237431617,
      "mass_error": null,
      "radius_error": null,
      "source": "jpl",
      "method": "dynamical mass / mean radius",
      "note": "Mean radius; rounded source values. Uncertainties not transcribed.",
      "original": {
        "mass": 1.024092e+26,
        "mass_unit": "kg",
        "radius": 24622,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "trappist-1-b",
      "name": "TRAPPIST-1 b",
      "category": "Exoplanets",
      "mass": 1.374,
      "radius": 1.116,
      "mass_error": [
        0.069,
        0.069
      ],
      "radius_error": [
        0.012,
        0.014
      ],
      "source": "agol",
      "method": "transit timing / transit",
      "note": "Transit-timing mass and transit radius; adopted 2021 solution.",
      "original": {
        "mass": 1.374,
        "mass_unit": "Earth",
        "radius": 1.116,
        "radius_unit": "Earth"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "trappist-1-c",
      "name": "TRAPPIST-1 c",
      "category": "Exoplanets",
      "mass": 1.308,
      "radius": 1.097,
      "mass_error": [
        0.056,
        0.056
      ],
      "radius_error": [
        0.012,
        0.014
      ],
      "source": "agol",
      "method": "transit timing / transit",
      "note": "Transit-timing mass and transit radius; adopted 2021 solution.",
      "original": {
        "mass": 1.308,
        "mass_unit": "Earth",
        "radius": 1.097,
        "radius_unit": "Earth"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "trappist-1-d",
      "name": "TRAPPIST-1 d",
      "category": "Exoplanets",
      "mass": 0.388,
      "radius": 0.788,
      "mass_error": [
        0.012,
        0.012
      ],
      "radius_error": [
        0.01,
        0.011
      ],
      "source": "agol",
      "method": "transit timing / transit",
      "note": "Transit-timing mass and transit radius; adopted 2021 solution.",
      "original": {
        "mass": 0.388,
        "mass_unit": "Earth",
        "radius": 0.788,
        "radius_unit": "Earth"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "trappist-1-e",
      "name": "TRAPPIST-1 e",
      "category": "Exoplanets",
      "mass": 0.692,
      "radius": 0.92,
      "mass_error": [
        0.022,
        0.022
      ],
      "radius_error": [
        0.012,
        0.013
      ],
      "source": "agol",
      "method": "transit timing / transit",
      "note": "Transit-timing mass and transit radius; adopted 2021 solution.",
      "original": {
        "mass": 0.692,
        "mass_unit": "Earth",
        "radius": 0.92,
        "radius_unit": "Earth"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "trappist-1-f",
      "name": "TRAPPIST-1 f",
      "category": "Exoplanets",
      "mass": 1.039,
      "radius": 1.045,
      "mass_error": [
        0.031,
        0.031
      ],
      "radius_error": [
        0.012,
        0.013
      ],
      "source": "agol",
      "method": "transit timing / transit",
      "note": "Transit-timing mass and transit radius; adopted 2021 solution.",
      "original": {
        "mass": 1.039,
        "mass_unit": "Earth",
        "radius": 1.045,
        "radius_unit": "Earth"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "trappist-1-g",
      "name": "TRAPPIST-1 g",
      "category": "Exoplanets",
      "mass": 1.321,
      "radius": 1.129,
      "mass_error": [
        0.038,
        0.038
      ],
      "radius_error": [
        0.013,
        0.015
      ],
      "source": "agol",
      "method": "transit timing / transit",
      "note": "Transit-timing mass and transit radius; adopted 2021 solution.",
      "original": {
        "mass": 1.321,
        "mass_unit": "Earth",
        "radius": 1.129,
        "radius_unit": "Earth"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "trappist-1-h",
      "name": "TRAPPIST-1 h",
      "category": "Exoplanets",
      "mass": 0.326,
      "radius": 0.755,
      "mass_error": [
        0.02,
        0.02
      ],
      "radius_error": [
        0.014,
        0.014
      ],
      "source": "agol",
      "method": "transit timing / transit",
      "note": "Transit-timing mass and transit radius; adopted 2021 solution.",
      "original": {
        "mass": 0.326,
        "mass_unit": "Earth",
        "radius": 0.755,
        "radius_unit": "Earth"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "55-cancri-e",
      "name": "55 Cancri e",
      "category": "Exoplanets",
      "mass": 7.99,
      "radius": 1.875,
      "mass_error": [
        0.33,
        0.32
      ],
      "radius_error": [
        0.029,
        0.029
      ],
      "source": "cancri",
      "method": "radial velocity / transit",
      "note": "",
      "original": {
        "mass": 7.99,
        "mass_unit": "Earth",
        "radius": 1.875,
        "radius_unit": "Earth"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "wasp-35-b",
      "name": "WASP-35 b",
      "category": "Exoplanets",
      "mass": 228.83702238884695,
      "radius": 14.81232390150357,
      "mass_error": [
        19.069751865737246,
        19.069751865737246
      ],
      "radius_error": [
        0.336643725034172,
        0.336643725034172
      ],
      "source": "wasp",
      "method": "radial velocity / transit",
      "note": "Published 2011 solution; inflated giant planet.",
      "original": {
        "mass": 0.72,
        "mass_unit": "Jupiter",
        "radius": 1.32,
        "radius_unit": "Jupiter"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "wasp-48-b",
      "name": "WASP-48 b",
      "category": "Exoplanets",
      "mass": 311.4726138070417,
      "radius": 18.73983402690224,
      "mass_error": [
        28.60462779860587,
        28.60462779860587
      ],
      "radius_error": [
        0.8977166000911254,
        0.8977166000911254
      ],
      "source": "wasp",
      "method": "radial velocity / transit",
      "note": "Published 2011 solution; inflated giant planet.",
      "original": {
        "mass": 0.98,
        "mass_unit": "Jupiter",
        "radius": 1.67,
        "radius_unit": "Jupiter"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "wasp-51-b",
      "name": "WASP-51 b",
      "category": "Exoplanets",
      "mass": 241.55019029933845,
      "radius": 15.934469651617475,
      "mass_error": [
        15.891459888114372,
        15.891459888114372
      ],
      "radius_error": [
        0.4488583000455627,
        0.4488583000455627
      ],
      "source": "wasp",
      "method": "radial velocity / transit",
      "note": "Published 2011 solution; inflated giant planet.",
      "original": {
        "mass": 0.76,
        "mass_unit": "Jupiter",
        "radius": 1.42,
        "radius_unit": "Jupiter"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "corot-3-b",
      "name": "CoRoT-3 b",
      "category": "Brown dwarfs",
      "mass": 6884.180423531146,
      "radius": 11.333672076150458,
      "mass_error": [
        317.82919776228744,
        317.82919776228744
      ],
      "radius_error": [
        0.7855020250797348,
        0.7855020250797348
      ],
      "source": "corot",
      "method": "radial velocity / transit",
      "note": "Classification is ambiguous: massive planet or brown dwarf; shown here in the substellar group.",
      "original": {
        "mass": 21.66,
        "mass_unit": "Jupiter",
        "radius": 1.01,
        "radius_unit": "Jupiter"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "wasp-30-b",
      "name": "WASP-30 b",
      "category": "Brown dwarfs",
      "mass": 19387.581063499532,
      "radius": 9.98709717601377,
      "mass_error": null,
      "radius_error": [
        0.22442915002278135,
        0.22442915002278135
      ],
      "source": "wasp30",
      "method": "radial velocity / transit",
      "note": "Rounded discovery-paper values, age approximately 1\u20132 Gyr; mass uncertainty not transcribed.",
      "original": {
        "mass": 61,
        "mass_unit": "Jupiter",
        "radius": 0.89,
        "radius_unit": "Jupiter"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "trappist-1",
      "name": "TRAPPIST-1",
      "category": "Low-mass stars",
      "mass": 29633.086466058397,
      "radius": 13.212931880610926,
      "mass_error": [
        1997.7361662511282,
        1997.7361662511282
      ],
      "radius_error": [
        0.3275933524118411,
        0.3275933524118411
      ],
      "source": "tstar",
      "method": "published estimate",
      "note": "Semi-empirical stellar mass; radius from luminosity and temperature.",
      "original": {
        "mass": 0.089,
        "mass_unit": "Sun",
        "radius": 0.121,
        "radius_unit": "Sun"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "ogle-tr-122-b",
      "name": "OGLE-TR-122 b",
      "category": "Low-mass stars",
      "mass": 30631.954549183964,
      "radius": 13.103734096473644,
      "mass_error": [
        2996.6042493766918,
        2996.6042493766918
      ],
      "radius_error": [
        1.419571193784645,
        2.1839556827456077
      ],
      "source": "ogle",
      "method": "eclipsing binary",
      "note": "",
      "original": {
        "mass": 0.092,
        "mass_unit": "Sun",
        "radius": 0.12,
        "radius_unit": "Sun"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "hats550-016-b",
      "name": "HATS550-016 B",
      "category": "Low-mass stars",
      "mass": 36625.16304793735,
      "radius": 16.052074268180213,
      "mass_error": [
        1997.7361662511282,
        1664.7801385426067
      ],
      "radius_error": [
        0.43679113654912155,
        0.3275933524118411
      ],
      "source": "hats",
      "method": "eclipsing binary / primary-star inference",
      "note": "",
      "original": {
        "mass": 0.11,
        "mass_unit": "Sun",
        "radius": 0.147,
        "radius_unit": "Sun"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "hats551-019-b",
      "name": "HATS551-019 B",
      "category": "Low-mass stars",
      "mass": 56602.52471044863,
      "radius": 19.655601144710467,
      "mass_error": [
        3329.5602770852133,
        3329.5602770852133
      ],
      "radius_error": [
        1.0919778413728038,
        1.0919778413728038
      ],
      "source": "hats",
      "method": "eclipsing binary / primary-star inference",
      "note": "",
      "original": {
        "mass": 0.17,
        "mass_unit": "Sun",
        "radius": 0.18,
        "radius_unit": "Sun"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "hats551-021-b",
      "name": "HATS551-021 B",
      "category": "Low-mass stars",
      "mass": 43950.19565752482,
      "radius": 16.816458757141177,
      "mass_error": [
        1664.7801385426067,
        4661.384387919299
      ],
      "radius_error": [
        0.8735822730982431,
        0.6551867048236822
      ],
      "source": "hats",
      "method": "eclipsing binary / primary-star inference",
      "note": "",
      "original": {
        "mass": 0.132,
        "mass_unit": "Sun",
        "radius": 0.154,
        "radius_unit": "Sun"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "hats553-001-b",
      "name": "HATS553-001 B",
      "category": "Low-mass stars",
      "mass": 66591.20554170427,
      "radius": 24.023512510201684,
      "mass_error": [
        6659.120554170427,
        3329.5602770852133
      ],
      "radius_error": [
        1.0919778413728038,
        1.0919778413728038
      ],
      "source": "hats",
      "method": "eclipsing binary / primary-star inference",
      "note": "",
      "original": {
        "mass": 0.2,
        "mass_unit": "Sun",
        "radius": 0.22,
        "radius_unit": "Sun"
      },
      "reviewed": "2026-10-14"
    },
    {
      "id": "sun",
      "name": "Sun",
      "category": "Sun",
      "mass": 332956.02770852135,
      "radius": 109.19778413728038,
      "mass_error": null,
      "radius_error": null,
      "source": "solar-conversion",
      "method": "adopted solar conversion constants",
      "note": "Solar reference: adopted mass 1.98847 \u00d7 10\u00b3\u2070 kg and radius 695700 km. The Sun is a solar-mass reference, not a low-mass star.",
      "original": {
        "mass": 1.98847e+30,
        "mass_unit": "kg",
        "radius": 695700,
        "radius_unit": "km"
      },
      "reviewed": "2026-10-14"
    }
  ]
}