{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T22:45:37.076Z","years_from_j2000":26.687,"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-3493-b","name":"TOI-3493 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":315.4662762806994,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":205.7990331,"dec_deg":-22.5854441,"epoch_ra_deg":206.169826,"epoch_dec_deg":-22.72094,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-3493","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":5.357034577408868e+25,"mass_msun":0.0000269413,"constellation":"Virgo","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-3493-b","radius_km":20537.482000000004,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-3493","host_v_mag":9.317,"uncertainties":{"mass_kg":[7.166601441349655e+24,6.987436405315914e+24],"radius_km":[510.24800000000005,510.24800000000005],"distance_ly":[1.3013639470898064,1.3121271075544587],"host_mass_solar":[0.041,0.041],"inclination_deg":[0.59,0.5],"host_radius_solar":[0.017,0.017],"host_temperature_k":[42,42],"orbital_period_days":[0.0000017,0.0000016]},"host_mass_solar":1.023,"inclination_deg":89.25,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.228,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"G1/2 V","host_temperature_k":5844,"orbital_period_days":8.1594667,"transit_midpoint_bjd":2459313.0467455,"equilibrium_temperature_k":1102},"designations":[{"catalog":"Exoplanet","designation":"TOI-3493 b"},{"catalog":"Host star","designation":"TOI-3493"}],"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."}