{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.688","julian_year":2026.688,"time":"2026-09-09T03:35:46.745Z","years_from_j2000":26.688,"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":"bd-63-1405-b","name":"BD+63 1405 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":124.09369549902252,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":271.3979337,"dec_deg":63.6700064,"epoch_ra_deg":271.43991,"epoch_dec_deg":63.671389,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"BD+63 1405","semi_major_axis_km":308171613.64199996,"periapsis_km":null,"mass_kg":1.9740495837469896e+28,"mass_msun":0.00992778,"constellation":"Draco","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/bd-63-1405-b","radius_km":79088.44,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"BD+63 1405","host_v_mag":8.96,"eccentricity":0.88,"uncertainties":{"mass_kg":[2.0879370597323925e+27,2.467561979683737e+27],"distance_ly":[0.10730544826880858,0.10730544826880858],"eccentricity":[0.02,0.02],"host_mass_solar":[0.083,0.083],"host_radius_solar":[0.059493,0.040718],"host_temperature_k":[53,53],"semi_major_axis_km":[20943701.898000002,20943701.898000002],"orbital_period_days":[60.79,60.79],"argument_of_periastron_deg":[3.76,3.76]},"host_mass_solar":0.816,"inclination_deg":5.974,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.804724,"planets_in_system":1,"discovery_facility":"Haute-Provence Observatory","host_spectral_type":"K0","host_temperature_k":5000,"orbital_period_days":1198.48,"periastron_epoch_bjd":2455771,"equilibrium_temperature_k":150.69,"argument_of_periastron_deg":94.25},"designations":[{"catalog":"Exoplanet","designation":"BD+63 1405 b"},{"catalog":"Host star","designation":"BD+63 1405"}],"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."}