{"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":"2026-09-07T21:57:31.966Z","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-114783-b","name":"HD 114783 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":68.69766552572223,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":198.1818436,"dec_deg":-2.2649921,"epoch_ra_deg":198.527949,"epoch_dec_deg":-2.407695,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 114783","semi_major_axis_km":173533530.01199996,"periapsis_km":null,"mass_kg":2.0878698865798663e+27,"mass_msun":0.00105002,"constellation":"Virgo","discovered":"2001","featured":false,"url":"https://spacecatalog.org/object/hd-114783-b","radius_km":87379.97,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 114783","host_v_mag":7.56,"eccentricity":0.144,"uncertainties":{"mass_kg":[1.138892412387816e+26,1.138892412387816e+26],"distance_ly":[0.09262841127155513,0.09295456764927187],"eccentricity":[0.032,0.032],"host_mass_solar":[0.034,0.034],"inclination_deg":[52,52],"host_radius_solar":[0.016574,0.016574],"host_temperature_k":[44,44],"semi_major_axis_km":[2842359.5432999996,2842359.5432999996],"orbital_period_days":[1.8,1.8],"argument_of_periastron_deg":[11,11]},"host_mass_solar":0.853,"inclination_deg":110,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.840622,"planets_in_system":2,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"K0","host_temperature_k":5135,"orbital_period_days":493.7,"periastron_epoch_bjd":2453806,"transit_midpoint_bjd":2455283.8,"equilibrium_temperature_k":210.79,"argument_of_periastron_deg":86},"designations":[{"catalog":"Exoplanet","designation":"HD 114783 b"},{"catalog":"Host star","designation":"HD 114783"}],"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."}