{"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":"2026-09-07T12:56:03.788Z","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-1278-b","name":"TOI-1278 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":246.4956178668283,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":320.4784442,"dec_deg":35.648625,"epoch_ra_deg":320.753208,"epoch_dec_deg":35.762776,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1278","semi_major_axis_km":14211797.7165,"periapsis_km":null,"mass_kg":3.511530509549933e+28,"mass_msun":0.01766,"constellation":"Cygnus","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1278-b","radius_km":77926.27976577601,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1278","host_v_mag":13.502,"eccentricity":0.013,"uncertainties":{"mass_kg":[9.490622998783604e+26,9.490622998783604e+26],"radius_km":[14298.399960534,17158.079965397],"distance_ly":[0.5053793072720939,0.5053793072720939],"eccentricity":[0.004,0.004],"host_mass_solar":[0.02,0.02],"inclination_deg":[0.1,0.1],"host_radius_solar":[0.012,0.012],"host_temperature_k":[42,42],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.00021,0.00021],"argument_of_periastron_deg":[12,9]},"host_mass_solar":0.54,"inclination_deg":88.3,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.573,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M0 V","host_temperature_k":3799,"orbital_period_days":14.47567,"transit_midpoint_bjd":2458711.9595,"equilibrium_temperature_k":407.87,"argument_of_periastron_deg":246},"designations":[{"catalog":"Exoplanet","designation":"TOI-1278 b"},{"catalog":"Host star","designation":"TOI-1278"}],"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."}