{"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":"2026-09-08T22:44:17.904Z","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-2977-b","name":"TOI-2977 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":143.9265177,"dec_deg":-60.3574758,"epoch_ra_deg":144.112691,"epoch_dec_deg":-60.477174,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2977","semi_major_axis_km":5065383.9019019995,"periapsis_km":null,"mass_kg":3.188849327591291e+27,"mass_msun":0.00160372,"constellation":"Carina","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-2977-b","radius_km":83931.607756854,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2977","host_v_mag":12.6334,"eccentricity":0,"uncertainties":{"mass_kg":[4.745311499391802e+26,4.9351239593674735e+26],"radius_km":[1930.284001688,2216.25198304],"host_mass_solar":[0.041,0.057],"inclination_deg":[0.82,0.57],"host_radius_solar":[0.02,0.024],"host_temperature_k":[93,94],"semi_major_axis_km":[74798.93535,100230.57336899999],"orbital_period_days":[0.0000025,0.0000025]},"host_mass_solar":0.936,"inclination_deg":89.19,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.073,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5691,"orbital_period_days":2.3505614,"transit_midpoint_bjd":2459373.83677,"equilibrium_temperature_k":1544},"designations":[{"catalog":"Exoplanet","designation":"TOI-2977 b"},{"catalog":"Host star","designation":"TOI-2977"}],"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."}