{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-05T01:05:12.084Z","years_from_j2000":26.676,"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-17-b","name":"CoRoT-17 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":3835.9903896021624,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":278.699236,"dec_deg":-6.612288,"epoch_ra_deg":279.060502,"epoch_dec_deg":-6.591468,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"CoRoT-17","semi_major_axis_km":6896461.839269999,"periapsis_km":null,"mass_kg":4.612245522616604e+27,"mass_msun":0.00231956,"constellation":"Scutum","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/corot-17-b","radius_km":72901.683,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"CoRoT-17","host_v_mag":16.29,"eccentricity":0,"uncertainties":{"mass_kg":[5.693864845152301e+26,5.693864845152301e+26],"radius_km":[4974.918000000001,4974.918000000001],"distance_ly":[170.2210135303684,186.4636011406622],"host_mass_solar":[0.1,0.1],"inclination_deg":[1.54,1.54],"host_radius_solar":[0.07,0.07],"host_temperature_k":[80,80],"semi_major_axis_km":[119678.29656,119678.29656],"orbital_period_days":[0.0003,0.0003]},"host_mass_solar":1.04,"inclination_deg":88.34,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.59,"planets_in_system":1,"discovery_facility":"CoRoT","host_spectral_type":"G2 V","host_temperature_k":5740,"orbital_period_days":3.7681,"periastron_epoch_bjd":2454923.3093,"transit_midpoint_bjd":2454923.3093,"equilibrium_temperature_k":1626,"argument_of_periastron_deg":0},"designations":[{"catalog":"Exoplanet","designation":"CoRoT-17 b"},{"catalog":"Host star","designation":"CoRoT-17"}],"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."}