{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-05T21:49:50.083Z","years_from_j2000":26.679,"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":"pds-70-c","name":"PDS 70 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":368.7654469016588,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":212.0421402,"dec_deg":-41.3980405,"epoch_ra_deg":212.455107,"epoch_dec_deg":-41.525738,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"PDS 70","semi_major_axis_km":5131206965.009999,"periapsis_km":null,"mass_kg":1.4235934498175404e+28,"mass_msun":0.00715946,"constellation":"Centaurus","discovered":"2019","featured":false,"url":"https://spacecatalog.org/object/pds-70-c","radius_km":141554.159634799,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"PDS 70","host_v_mag":12.032,"eccentricity":0.037,"uncertainties":{"mass_kg":[7.972123318978227e+27,8.921185618856587e+27],"radius_km":[22162.519957962002,27881.879903907004],"distance_ly":[1.6927516003498984,1.7057978554585682],"eccentricity":[0.025,0.041],"host_mass_solar":[0.066,0.066],"inclination_deg":[2.4,2.5],"host_radius_solar":[0.15,0.15],"host_temperature_k":[30,36],"semi_major_axis_km":[269276167.26,329115315.54],"argument_of_periastron_deg":[23,29]},"host_mass_solar":0.982,"inclination_deg":130.5,"stars_in_system":1,"discovery_method":"Imaging","host_radius_solar":1.26,"planets_in_system":2,"discovery_facility":"European Southern Observatory","host_spectral_type":"K7","host_temperature_k":4109,"equilibrium_temperature_k":1054,"argument_of_periastron_deg":53},"designations":[{"catalog":"Exoplanet","designation":"PDS 70 c"},{"catalog":"Host star","designation":"PDS 70"}],"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."}