{"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":"2026-09-07T02:08:41.544Z","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-180314-b","name":"HD 180314 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":399.0914669017616,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":288.7094401,"dec_deg":31.8604391,"epoch_ra_deg":288.965158,"epoch_dec_deg":31.906559,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 180314","semi_major_axis_km":216617716.77359998,"periapsis_km":null,"mass_kg":4.310071528668183e+28,"mass_msun":0.021676,"constellation":"Lyra","discovered":"2010","featured":false,"url":"https://spacecatalog.org/object/hd-180314-b","radius_km":76537.20000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 180314","host_v_mag":6.61519,"eccentricity":0.247,"uncertainties":{"mass_kg":[4.840217729678246e+26,4.783273991148049e+26],"distance_ly":[1.464442135948178,1.464442135948178],"eccentricity":[0.009,0.009],"host_mass_solar":[0.3,0.3],"host_radius_solar":[0.4,0.4],"host_temperature_k":[100,100],"orbital_period_days":[0.13,0.13],"argument_of_periastron_deg":[2.5,2.5]},"host_mass_solar":2.6,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":9.2,"planets_in_system":1,"discovery_facility":"Subaru Telescope","host_spectral_type":"K0","host_temperature_k":4917,"orbital_period_days":394.73,"periastron_epoch_bjd":2453570.6,"equilibrium_temperature_k":597.64,"argument_of_periastron_deg":-56.3},"designations":[{"catalog":"Exoplanet","designation":"HD 180314 b"},{"catalog":"Host star","designation":"HD 180314"}],"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."}