{"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":"2026-09-08T07:09:12.524Z","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-1794-b","name":"TOI-1794 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":508.1222824086917,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":203.3974857,"dec_deg":49.0608433,"epoch_ra_deg":203.675509,"epoch_dec_deg":48.922772,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1794","semi_major_axis_km":12267025.3974,"periapsis_km":null,"mass_kg":5.195786044978499e+25,"mass_msun":0.0000261304,"constellation":"Canes Venatici","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-1794-b","radius_km":21028.676574308,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1794","host_v_mag":10.32,"eccentricity":0,"uncertainties":{"mass_kg":[2.3888671471165517e+25,2.4485888257944653e+25],"radius_km":[870.7005174290001,1062.3755613150001],"distance_ly":[2.018907978066642,2.035215796952479],"host_mass_solar":[0.0308,0.0328],"inclination_deg":[2.09207,1.0103],"host_radius_solar":[0.023,0.023],"host_temperature_k":[74,78],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[0.000035,0.000035]},"host_mass_solar":0.9698,"inclination_deg":88.60828,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.3162,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5631,"orbital_period_days":8.765528,"transit_midpoint_bjd":2458715.312,"equilibrium_temperature_k":992.91,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1794 b"},{"catalog":"Host star","designation":"TOI-1794"}],"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."}