{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T12:54:16.691Z","years_from_j2000":26.683,"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-858-b-b","name":"TOI-858 B b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":816.9858489788934,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":60.1998256,"dec_deg":-54.5929177,"epoch_ra_deg":60.363194,"epoch_dec_deg":-54.516766,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-858 B","semi_major_axis_km":6634665.565544999,"periapsis_km":null,"mass_kg":2.0879370597323925e+27,"mass_msun":0.00105005,"constellation":"Reticulum","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-858-b-b","radius_km":89722.459761918,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-858 B","host_v_mag":11.183,"uncertainties":{"mass_kg":[1.3286872198297045e+26,1.5184996798053766e+26],"radius_km":[2788.1880095250003,2788.1880095250003],"distance_ly":[4.892345665751151,4.951053813740165],"host_mass_solar":[0.07,0.076],"inclination_deg":[0.44,0.5],"host_radius_solar":[0.038,0.037],"host_temperature_k":[79,84],"semi_major_axis_km":[146605.913286,149597.8707],"orbital_period_days":[0.0000014,0.0000014]},"host_mass_solar":1.081,"inclination_deg":86.8,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.308,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"G0","host_temperature_k":5842,"orbital_period_days":3.2797178,"transit_midpoint_bjd":2458386.45235,"eccentricity_upper_limit":0.15,"equilibrium_temperature_k":1529},"designations":[{"catalog":"Exoplanet","designation":"TOI-858 B b"},{"catalog":"Host star","designation":"TOI-858 B"}],"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."}