{"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":"2026-09-07T12:51:59.779Z","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-4961-b","name":"TOI-4961 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":694.9511786923968,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":192.5018624,"dec_deg":-59.8919345,"epoch_ra_deg":192.899116,"epoch_dec_deg":-60.038361,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-4961","semi_major_axis_km":10860805.412819998,"periapsis_km":null,"mass_kg":3.4166242795620973e+27,"mass_msun":0.00171827,"constellation":"Crux","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-4961-b","radius_km":78712.69177827501,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-4961","host_v_mag":12.486,"eccentricity":0.182,"uncertainties":{"mass_kg":[4.365686579440458e+26,3.986061659489114e+26],"radius_km":[2788.1880095250003,2931.172000201],"distance_ly":[4.416157354284707,4.4716039384965525],"eccentricity":[0.048,0.04],"host_mass_solar":[0.04,0.051],"inclination_deg":[0.14,0.13],"host_radius_solar":[0.03,0.032],"host_temperature_k":[170,180],"semi_major_axis_km":[164557.65777,194477.23190999997],"orbital_period_days":[0.0000082,0.0000082],"argument_of_periastron_deg":[15,10]},"host_mass_solar":0.912,"inclination_deg":88.11,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.912,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5380,"orbital_period_days":7.479182,"transit_midpoint_bjd":2459884.82079,"equilibrium_temperature_k":919,"argument_of_periastron_deg":-126},"designations":[{"catalog":"Exoplanet","designation":"TOI-4961 b"},{"catalog":"Host star","designation":"TOI-4961"}],"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."}