{"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":"2026-09-08T06:16:34.817Z","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":"toi-5126-c","name":"TOI-5126 c","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":523.2004917505368,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":151.6597827,"dec_deg":18.6340631,"epoch_ra_deg":152.028466,"epoch_dec_deg":18.503262,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-5126","semi_major_axis_km":21527133.59373,"periapsis_km":null,"mass_kg":8.480478372263759e+25,"mass_msun":0.0000426495,"constellation":"Leo","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-5126-c","radius_km":24619.466,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-5126","host_v_mag":10.141,"eccentricity":0,"uncertainties":{"radius_km":[1020.4960000000001,1084.277],"distance_ly":[5.159793895478881,5.264163936348239],"host_mass_solar":[0.046,0.05],"inclination_deg":[0.25,0.32],"host_radius_solar":[0.027,0.032],"host_temperature_k":[130,110],"semi_major_axis_km":[269276.16725999996,284235.95433],"orbital_period_days":[0.0013,0.0018]},"host_mass_solar":1.24,"inclination_deg":89.23,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.241,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F V","host_temperature_k":6150,"orbital_period_days":17.8999,"transit_midpoint_bjd":2459613.7443,"equilibrium_temperature_k":971,"argument_of_periastron_deg":0},"designations":[{"catalog":"Exoplanet","designation":"TOI-5126 c"}],"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."}