{"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":"2026-09-08T00:07:16.951Z","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-1742-b","name":"TOI-1742 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":237.72592518278051,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":257.3288678,"dec_deg":71.8766724,"epoch_ra_deg":257.229338,"epoch_dec_deg":71.841482,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1742","semi_major_axis_km":23038072.087799996,"periapsis_km":null,"mass_kg":5.793002831757638e+25,"mass_msun":0.0000291338,"constellation":"Draco","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-1742-b","radius_km":15084.691108038,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1742","host_v_mag":8.863,"eccentricity":0.3,"uncertainties":{"mass_kg":[1.134711894880362e+25,1.134711894880362e+25],"radius_km":[325.7550794,362.985260939],"distance_ly":[0.38877840223835813,0.3900830277492251],"eccentricity":[0.1,0.1],"host_mass_solar":[0.0333,0.034],"host_radius_solar":[0.0185,0.0181],"host_temperature_k":[73,76],"semi_major_axis_km":[448793.61209999997,448793.61209999997],"orbital_period_days":[0.000051,0.000051],"argument_of_periastron_deg":[32,32]},"host_mass_solar":1.0861,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.131,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5815,"orbital_period_days":21.269084,"transit_midpoint_bjd":2458725.3518,"equilibrium_temperature_k":694.09,"argument_of_periastron_deg":37},"designations":[{"catalog":"Exoplanet","designation":"TOI-1742 b"},{"catalog":"Host star","designation":"TOI-1742"}],"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."}