{"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":"2026-09-07T04:23:05.815Z","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":"ogle2-tr-l9-b","name":"OGLE2-TR-L9 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":5308.619050631031,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":166.9798793,"dec_deg":-61.1462496,"epoch_ra_deg":167.259345,"epoch_dec_deg":-61.291547,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"OGLE2-TR-L9","semi_major_axis_km":4607614.41756,"periapsis_km":null,"mass_kg":8.541245180318535e+27,"mass_msun":0.00429552,"constellation":"Carina","discovered":"2008","featured":false,"url":"https://spacecatalog.org/object/ogle2-tr-l9-b","radius_km":115099.19260000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"OGLE2-TR-L9","host_v_mag":14.718,"uncertainties":{"mass_kg":[2.8470817267728453e+27,2.8470817267728453e+27],"radius_km":[2857.3888,2857.3888],"distance_ly":[238.74646848865618,261.8383400310016],"host_mass_solar":[0.08,0.08],"inclination_deg":[0.3,0.3],"host_radius_solar":[0.04,0.04],"host_temperature_k":[58,58],"semi_major_axis_km":[74798.93535,74798.93535],"orbital_period_days":[7e-7,7e-7]},"host_mass_solar":1.52,"inclination_deg":79.8,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.53,"planets_in_system":1,"discovery_facility":"OGLE","host_temperature_k":6933,"orbital_period_days":2.4855335,"transit_midpoint_bjd":2454492.79765,"equilibrium_temperature_k":2034},"designations":[{"catalog":"Exoplanet","designation":"OGLE2-TR-L9 b"},{"catalog":"Host star","designation":"OGLE2-TR-L9"}],"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."}