{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T14:32:01.678Z","years_from_j2000":26.67,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"kepler-107-d","name":"Kepler-107 d","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1715.5727620987386,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":297.028162,"dec_deg":48.2086019,"epoch_ra_deg":297.221991,"epoch_dec_deg":48.274702,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-107","semi_major_axis_km":12531813.628538998,"periapsis_km":null,"mass_kg":4.598569258199362e+25,"mass_msun":0.0000231269,"constellation":"Cygnus","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-107-d","radius_km":5485.166,"radius_kind":null,"data_quality":"The published mass and radius imply a density no material has. One of the two is likely an upper limit rather than a measurement.","description":null,"properties":{"host_star":"Kepler-107","host_v_mag":12.543,"uncertainties":{"radius_km":[382.68600000000004,382.68600000000004],"distance_ly":[18.18974118526278,18.581128838522872],"host_mass_solar":[0.029,0.029],"inclination_deg":[0.48,0.64],"host_radius_solar":[0.014,0.014],"host_temperature_k":[61,61],"semi_major_axis_km":[97238.61595499999,97238.61595499999],"orbital_period_days":[0.00012,0.00012]},"host_mass_solar":1.238,"inclination_deg":87.55,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.447,"planets_in_system":4,"discovery_facility":"Kepler","host_temperature_k":5854,"orbital_period_days":7.95839,"transit_midpoint_bjd":2455702.9547,"eccentricity_upper_limit":0.11,"equilibrium_temperature_k":1173},"designations":[{"catalog":"Exoplanet","designation":"Kepler-107 d"}],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"updated_at":"2026-09-01T22:58:55.274Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}