{"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":"2026-09-08T06:05:44.509Z","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-1227-b","name":"TOI-1227 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":328.24704009790776,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":186.7673635,"dec_deg":-72.4518501,"epoch_ra_deg":187.161987,"epoch_dec_deg":-72.600619,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1227","semi_major_axis_km":13254371.344019998,"periapsis_km":null,"mass_kg":3.971491632081267e+26,"mass_msun":0.000199732,"constellation":"Musca","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/toi-1227-b","radius_km":61054.167845512005,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1227","host_v_mag":16.999,"uncertainties":{"radius_km":[3717.5840127000006,4789.964006551],"distance_ly":[1.8460450978767675,1.8688760443169397],"host_mass_solar":[0.015,0.015],"inclination_deg":[0.093,0.062],"host_radius_solar":[0.03,0.03],"host_temperature_k":[74,74],"semi_major_axis_km":[852707.8629899999,807828.5017799999],"orbital_period_days":[0.00011,0.00011]},"host_mass_solar":0.17,"inclination_deg":88.571,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.56,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M4.5V-M5V","host_temperature_k":3072,"orbital_period_days":27.36397,"transit_midpoint_bjd":2458617.4621,"equilibrium_temperature_k":243.77},"designations":[{"catalog":"Exoplanet","designation":"TOI-1227 b"},{"catalog":"Host star","designation":"TOI-1227"}],"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."}