{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T07:22:26.856Z","years_from_j2000":26.683,"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":"hd-148427-b","name":"HD 148427 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":232.71224934451874,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":247.1171311,"dec_deg":-13.3996231,"epoch_ra_deg":247.494116,"epoch_dec_deg":-13.459453,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 148427","semi_major_axis_km":166053636.477,"periapsis_km":null,"mass_kg":2.2777495197080646e+27,"mass_msun":0.00114551,"constellation":"Ophiuchus","discovered":"2009","featured":false,"url":"https://spacecatalog.org/object/hd-148427-b","radius_km":87379.97,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 148427","host_v_mag":6.90498,"eccentricity":0.12,"uncertainties":{"mass_kg":[5.6943737992701615e+26,3.7962491995134415e+26],"distance_ly":[1.0014631577792605,1.0014631577792605],"eccentricity":[0.08,0.09],"host_mass_solar":[0.27,0.27],"inclination_deg":[30.7,30.5],"host_radius_solar":[0.12,0.12],"host_temperature_k":[4,4],"semi_major_axis_km":[8975872.241999999,8975872.241999999],"orbital_period_days":[2.2,1.9],"argument_of_periastron_deg":[68.4,40.3]},"host_mass_solar":1.64,"inclination_deg":90.2,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":3.86,"planets_in_system":1,"discovery_facility":"Lick Observatory","host_spectral_type":"K0 III- IV","host_temperature_k":5025,"orbital_period_days":331.9,"periastron_epoch_bjd":2457969,"equilibrium_temperature_k":451.86,"argument_of_periastron_deg":267.2},"designations":[{"catalog":"Exoplanet","designation":"HD 148427 b"},{"catalog":"Host star","designation":"HD 148427"}],"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."}