{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T08:12:55.079Z","years_from_j2000":26.685,"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-129445-b","name":"HD 129445 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":219.9552949428837,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":221.5104196,"dec_deg":-68.7629901,"epoch_ra_deg":222.107634,"epoch_dec_deg":-68.876035,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 129445","semi_major_axis_km":433833825.03,"periapsis_km":null,"mass_kg":4.764292745389369e+27,"mass_msun":0.00239603,"constellation":"Circinus","discovered":"2009","featured":false,"url":"https://spacecatalog.org/object/hd-129445-b","radius_km":84828.73000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 129445","host_v_mag":8.8,"eccentricity":0.7,"uncertainties":{"mass_kg":[1.0249872838686292e+27,2.0879370597323925e+27],"distance_ly":[0.5221763607245062,0.5247856117462402],"eccentricity":[0.1,0.1],"inclination_deg":[19,24],"host_radius_solar":[0.008623,0.014396],"host_temperature_k":[42,42],"semi_major_axis_km":[29919574.14,29919574.14],"orbital_period_days":[55,55],"argument_of_periastron_deg":[15,15]},"host_mass_solar":0.99,"inclination_deg":52,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.175816,"planets_in_system":1,"discovery_facility":"Las Campanas Observatory","host_spectral_type":"G6 V","host_temperature_k":5646,"orbital_period_days":1840,"periastron_epoch_bjd":2453093,"equilibrium_temperature_k":173.36,"argument_of_periastron_deg":163},"designations":[{"catalog":"Exoplanet","designation":"HD 129445 b"},{"catalog":"Host star","designation":"HD 129445"}],"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."}