{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T21:35:45.825Z","years_from_j2000":26.67,"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":"corot-9-b","name":"CoRoT-9 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1346.9606086946071,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":280.7866461,"dec_deg":6.2040783,"epoch_ra_deg":281.114636,"epoch_dec_deg":6.230214,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"CoRoT-9","semi_major_axis_km":60153303.808469996,"periapsis_km":null,"mass_kg":1.5944326552729126e+27,"mass_msun":0.000801863,"constellation":"Serpens","discovered":"2009","featured":false,"url":"https://spacecatalog.org/object/corot-9-b","radius_km":76210.6030114,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"CoRoT-9","host_v_mag":13.637,"eccentricity":0.133,"uncertainties":{"mass_kg":[9.490670567100671e+25,9.490670567100671e+25],"radius_km":[4504.0037427,5361.9092175],"distance_ly":[15.07494777806788,15.410888847116125],"eccentricity":[0.037,0.042],"host_mass_solar":[0.04,0.04],"inclination_deg":[0.084,0.066],"host_radius_solar":[0.06,0.06],"host_temperature_k":[80,80],"semi_major_axis_km":[807828.5017799999,807828.5017799999],"orbital_period_days":[0.000068,0.000068],"argument_of_periastron_deg":[24,31]},"host_mass_solar":0.96,"inclination_deg":89.9,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.96,"planets_in_system":1,"discovery_facility":"CoRoT","host_spectral_type":"G3 V","host_temperature_k":5625,"orbital_period_days":95.272656,"periastron_epoch_bjd":2454603.3447,"transit_midpoint_bjd":2455365.52723,"equilibrium_temperature_k":420,"argument_of_periastron_deg":41},"designations":[{"catalog":"Exoplanet","designation":"CoRoT-9 b"},{"catalog":"Host star","designation":"CoRoT-9"}],"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."}