{"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":"2026-09-08T06:16:04.494Z","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-2981-b","name":"TOI-2981 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1721.417484387423,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":163.487394,"dec_deg":-25.5245988,"epoch_ra_deg":163.810444,"epoch_dec_deg":-25.667491,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2981","semi_major_axis_km":7180697.7935999995,"periapsis_km":null,"mass_kg":3.8102430996509e+27,"mass_msun":0.00191623,"constellation":"Hydra","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-2981-b","radius_km":85466.54000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2981","host_v_mag":13.361,"uncertainties":{"mass_kg":[1.970815396371155e+26,1.970815396371155e+26],"radius_km":[2678.802,2678.802],"distance_ly":[22.834208003949207,23.444120430279515],"host_mass_solar":[0.06,0.06],"inclination_deg":[0.56,0.79],"host_radius_solar":[0.032,0.032],"host_temperature_k":[75,75],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[0.000002,0.000002],"argument_of_periastron_deg":[134,98]},"host_mass_solar":1.03,"inclination_deg":87.98,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.08,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5940,"orbital_period_days":3.601501,"transit_midpoint_bjd":2459302.7195,"eccentricity_upper_limit":0.035,"equilibrium_temperature_k":1358,"argument_of_periastron_deg":28},"designations":[{"catalog":"Exoplanet","designation":"TOI-2981 b"},{"catalog":"Host star","designation":"TOI-2981"}],"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."}