{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T18:16:36.207Z","years_from_j2000":26.684,"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-112640-b","name":"HD 112640 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1054.5777238904323,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":194.2415171,"dec_deg":67.2429122,"epoch_ra_deg":194.502886,"epoch_dec_deg":67.097437,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 112640","semi_major_axis_km":254316380.18999997,"periapsis_km":null,"mass_kg":9.49067056710067e+27,"mass_msun":0.004773,"constellation":"Draco","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hd-112640-b","radius_km":82277.49,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 112640","host_v_mag":6.53649,"eccentricity":0.24,"uncertainties":{"mass_kg":[1.898134113420134e+27,1.898134113420134e+27],"distance_ly":[8.016923764277553,8.140863187809916],"eccentricity":[0.18,0.18],"host_mass_solar":[0.2,0.2],"host_radius_solar":[5,5],"host_temperature_k":[15,15],"semi_major_axis_km":[14959787.07,14959787.07],"orbital_period_days":[5.8,5.8],"argument_of_periastron_deg":[22.8,22.8]},"host_mass_solar":1.8,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":39,"planets_in_system":1,"discovery_facility":"Bohyunsan Optical Astronomical Observatory","host_spectral_type":"K0 III","host_temperature_k":4155,"orbital_period_days":613.2,"periastron_epoch_bjd":2455300.4,"equilibrium_temperature_k":959.65,"argument_of_periastron_deg":114.4},"designations":[{"catalog":"Exoplanet","designation":"HD 112640 b"},{"catalog":"Host star","designation":"HD 112640"}],"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."}