{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T18:53:02.778Z","years_from_j2000":26.676,"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-1489-c","name":"Kepler-1489 c","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":4184.749404294676,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":281.2957984,"dec_deg":44.4654063,"epoch_ra_deg":281.495539,"epoch_dec_deg":44.492705,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1489","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":5.1957860449784995e+23,"mass_msun":2.61304e-7,"constellation":"Lyra","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/kepler-1489-c","radius_km":3252.831,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1489","host_v_mag":14.983,"uncertainties":{"radius_km":[510.24800000000005,510.24800000000005],"distance_ly":[111.4802499035829,117.64460544242935],"host_mass_solar":[0.062,0.05],"host_radius_solar":[0.066,0.132],"orbital_period_days":[0.000004,0.000004]},"host_mass_solar":0.977,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.957,"planets_in_system":2,"discovery_facility":"Kepler","host_spectral_type":"G","host_temperature_k":5565.53,"orbital_period_days":0.680741,"transit_midpoint_bjd":2454832.96},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1489 c"}],"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."}