{"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":"2026-09-08T01:55:52.671Z","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":"hat-p-19-b","name":"HAT-P-19 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":659.0902849624408,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":9.5165832,"dec_deg":34.7114025,"epoch_ra_deg":9.876784,"epoch_dec_deg":34.859244,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HAT-P-19","semi_major_axis_km":6880006.073493,"periapsis_km":null,"mass_kg":5.257805141385838e+26,"mass_msun":0.000264423,"constellation":"Andromeda","discovered":"2010","featured":false,"url":"https://spacecatalog.org/object/hat-p-19-b","radius_km":72063.935829155,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HAT-P-19","host_v_mag":12.826,"eccentricity":0.07,"uncertainties":{"mass_kg":[3.0369993584163196e+25,3.226811820183642e+25],"radius_km":[929.3960031750001,1000.8879985130002],"distance_ly":[4.732529040669947,4.797760316213296],"eccentricity":[0.04,0.04],"host_mass_solar":[0.03,0.034],"inclination_deg":[0.2,0.2],"host_radius_solar":[0.01,0.011],"host_temperature_k":[41,39],"semi_major_axis_km":[86766.76500599999,94246.658541],"orbital_period_days":[1.9e-7,1.9e-7],"argument_of_periastron_deg":[77,77]},"host_mass_solar":0.807,"inclination_deg":89.52,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.773,"planets_in_system":1,"discovery_facility":"HATNet","host_spectral_type":"K1","host_temperature_k":4962,"orbital_period_days":4.00878322,"transit_midpoint_bjd":2456610.863945,"equilibrium_temperature_k":981.2,"argument_of_periastron_deg":256},"designations":[{"catalog":"Exoplanet","designation":"HAT-P-19 b"},{"catalog":"Host star","designation":"HAT-P-19"}],"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."}