{"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":"2026-09-07T01:15:00.027Z","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":"hd-202206-c","name":"HD 202206 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":149.92267136316687,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":318.7405221,"dec_deg":-20.7897284,"epoch_ra_deg":319.122609,"epoch_dec_deg":-20.678472,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 202206","semi_major_axis_km":360530868.38699996,"periapsis_km":null,"mass_kg":3.39766006302204e+28,"mass_msun":0.0170873,"constellation":"Capricornus","discovered":"2004","featured":false,"url":"https://spacecatalog.org/object/hd-202206-c","radius_km":77812.82,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 202206","host_v_mag":8.08,"eccentricity":0.22,"uncertainties":{"mass_kg":[3.4166414041562413e+27,5.504588928918388e+27],"distance_ly":[0.45107427038225617,0.4536835214039901],"eccentricity":[0.03,0.03],"host_mass_solar":[0.08,0.08],"inclination_deg":[1.1,1.1],"host_radius_solar":[0.01,0.01],"orbital_period_days":[11,11],"argument_of_periastron_deg":[4,4]},"host_mass_solar":1.07,"inclination_deg":7.7,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":1.04,"planets_in_system":1,"discovery_facility":"La Silla Observatory","host_spectral_type":"G6 V","host_temperature_k":5766,"orbital_period_days":1260,"periastron_epoch_bjd":2453103,"equilibrium_temperature_k":182.65,"argument_of_periastron_deg":280},"designations":[{"catalog":"Exoplanet","designation":"HD 202206 c"},{"catalog":"Host star","designation":"HD 202206"}],"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."}