{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T10:41:45.890Z","years_from_j2000":26.686,"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-6884-b","name":"TOI-6884 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1834.2251907483128,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":193.0087935,"dec_deg":26.673951,"epoch_ra_deg":193.337142,"epoch_dec_deg":26.527765,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-6884","semi_major_axis_km":9409706.06703,"periapsis_km":null,"mass_kg":4.995863946559688e+28,"mass_msun":0.0251249,"constellation":"Coma Berenices","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/toi-6884-b","radius_km":66273.08382409101,"radius_kind":null,"data_quality":"The published mass and radius imply a density no material has. One of the two is likely an upper limit rather than a measurement.","description":null,"properties":{"host_star":"TOI-6884","host_v_mag":11.985,"eccentricity":0.067,"uncertainties":{"mass_kg":[1.7652558777737504e+27,1.8601621077615863e+27],"radius_km":[3717.5840127000006,3646.092017362],"distance_ly":[48.5744693333546,51.235905375523224],"eccentricity":[0.012,0.01],"host_mass_solar":[0.069,0.075],"inclination_deg":[0.42,0.45],"host_radius_solar":[0.073,0.072],"host_temperature_k":[160,180],"semi_major_axis_km":[149597.8707,164557.65777],"orbital_period_days":[0.000014,0.000015],"argument_of_periastron_deg":[6.9,5.2]},"host_mass_solar":1.41,"inclination_deg":82.46,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.84,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6330,"orbital_period_days":4.808264,"transit_midpoint_bjd":2459641.0987,"equilibrium_temperature_k":1652,"argument_of_periastron_deg":82.3},"designations":[{"catalog":"Exoplanet","designation":"TOI-6884 b"},{"catalog":"Host star","designation":"TOI-6884"}],"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."}