{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T04:32:55.780Z","years_from_j2000":26.671,"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-1972-b","name":"Kepler-1972 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":937.1744741675134,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":288.3953074,"dec_deg":39.8725067,"epoch_ra_deg":288.62023,"epoch_dec_deg":39.917778,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1972","semi_major_axis_km":11976805.528242,"periapsis_km":null,"mass_kg":1.2063779092938586e+25,"mass_msun":0.00000606705,"constellation":"Lyra","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/kepler-1972-b","radius_km":5115.2362,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1972","host_v_mag":11.23,"eccentricity":0.067,"uncertainties":{"mass_kg":[3.702744078030655e+24,3.344414005963173e+24],"radius_km":[261.50210000000004,267.88020000000006],"distance_ly":[6.744913891182254,6.842760804497276],"eccentricity":[0.04,0.071],"host_mass_solar":[0.03,0.03],"inclination_deg":[0.49,0.73],"host_radius_solar":[0.05,0.05],"host_temperature_k":[27,27],"semi_major_axis_km":[76294.914057,76294.914057],"orbital_period_days":[0.00054,0.00054],"argument_of_periastron_deg":[57.2,50.1]},"host_mass_solar":1.12,"inclination_deg":87.62,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.384,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":5818,"orbital_period_days":7.54425,"transit_midpoint_bjd":2454944.8999,"equilibrium_temperature_k":1084,"argument_of_periastron_deg":64.9},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1972 b"}],"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":"2026-09-02T19:50:56.720Z","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."}