{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T04:19:10.473Z","years_from_j2000":26.682,"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-3912-b","name":"TOI-3912 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1519.862627649807,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":215.8014956,"dec_deg":24.0765639,"epoch_ra_deg":216.107436,"epoch_dec_deg":23.954138,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-3912","semi_major_axis_km":6926381.41341,"periapsis_km":null,"mass_kg":7.706385874892841e+26,"mass_msun":0.000387565,"constellation":"Boötes","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-3912-b","radius_km":91080.80773712101,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-3912","host_v_mag":12.507,"eccentricity":0,"uncertainties":{"mass_kg":[1.2907247280734568e+26,1.3476684660064368e+26],"radius_km":[2859.6800048630002,2931.172000201],"distance_ly":[20.90010068408892,21.480659036424722],"host_mass_solar":[0.07,0.086],"inclination_deg":[0.52,0.55],"host_radius_solar":[0.034,0.035],"host_temperature_k":[68,69],"semi_major_axis_km":[149597.8707,179517.44483999998],"orbital_period_days":[0.0000038,0.0000038]},"host_mass_solar":1.088,"inclination_deg":85.64,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.392,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5725,"orbital_period_days":3.4936264,"transit_midpoint_bjd":2459442.81871,"equilibrium_temperature_k":1512},"designations":[{"catalog":"Exoplanet","designation":"TOI-3912 b"},{"catalog":"Host star","designation":"TOI-3912"}],"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."}