{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T17:14:04.506Z","years_from_j2000":26.686,"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":"toi-2019-b","name":"TOI-2019 b","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":645.8124588255921,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":234.4317651,"dec_deg":48.955206,"epoch_ra_deg":234.637882,"epoch_dec_deg":48.86652,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2019","semi_major_axis_km":19148527.4496,"periapsis_km":null,"mass_kg":2.0544257465202343e+26,"mass_msun":0.00010332,"constellation":"Boötes","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-2019-b","radius_km":34012.834269197,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2019","host_v_mag":10.263,"eccentricity":0,"uncertainties":{"mass_kg":[2.627753861828207e+25,2.627753861828207e+25],"radius_km":[1328.162468895,1681.991775941],"distance_ly":[2.6646976059457934,2.684266988608798],"host_mass_solar":[0.0237,0.1057],"host_radius_solar":[0.0289,0.0295],"host_temperature_k":[78,77],"semi_major_axis_km":[448793.61209999997,448793.61209999997],"orbital_period_days":[0.0057,0.0057],"argument_of_periastron_deg":[57,57]},"host_mass_solar":1.1832,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.7457,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5626,"orbital_period_days":15.3444,"transit_midpoint_bjd":2458942.942,"equilibrium_temperature_k":917.46,"argument_of_periastron_deg":57},"designations":[{"catalog":"Exoplanet","designation":"TOI-2019 b"},{"catalog":"Host star","designation":"TOI-2019"}],"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."}