{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T20:34:26.064Z","years_from_j2000":26.684,"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-5726-01","name":"TOI-5726.01","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":355.01469401712086,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":123.3950504,"dec_deg":68.5745899,"epoch_ra_deg":124.05896,"epoch_dec_deg":68.493451,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-5726","semi_major_axis_km":9302893.187350199,"periapsis_km":null,"mass_kg":4.210378346792922e+25,"mass_msun":0.0000211746,"constellation":"Ursa Major","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-5726-01","radius_km":16289.6674,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-5726","host_v_mag":9.736,"uncertainties":{"radius_km":[1128.9237,1785.8680000000002],"distance_ly":[1.164378268448774,1.1741629597802763],"host_mass_solar":[0.13,0.13],"host_radius_solar":[0.051,0.051],"host_temperature_k":[119,119],"semi_major_axis_km":[399127.1190275999,367113.17469779996],"orbital_period_days":[0.000014569,0.000009458]},"host_mass_solar":1.06,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.106,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5874,"orbital_period_days":5.491125215,"transit_midpoint_bjd":2458843.5951,"equilibrium_temperature_k":1093.03},"designations":[{"catalog":"Exoplanet","designation":"TOI-5726.01"},{"catalog":"Host star","designation":"TOI-5726"}],"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."}