{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T17:31:12.149Z","years_from_j2000":26.681,"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-114729-b","name":"HD 114729 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":123.30765862872516,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":198.1833997,"dec_deg":-31.8746756,"epoch_ra_deg":198.555651,"epoch_dec_deg":-32.017341,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 114729","semi_major_axis_km":309218798.7369,"periapsis_km":null,"mass_kg":1.5659606435716106e+27,"mass_msun":0.000787544,"constellation":"Centaurus","discovered":"2002","featured":false,"url":"https://spacecatalog.org/object/hd-114729-b","radius_km":88655.59000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 114729","host_v_mag":6.68,"eccentricity":0.079,"uncertainties":{"mass_kg":[1.3286938793940939e+25,1.3286938793940939e+25],"distance_ly":[0.16862284727955634,0.16894900365727308],"eccentricity":[0.032,0.029],"host_mass_solar":[0.013,0.013],"host_radius_solar":[0.037,0.037],"host_temperature_k":[12,12],"semi_major_axis_km":[1495978.707,1495978.707],"orbital_period_days":[3.43,3.53],"argument_of_periastron_deg":[27.685,27.681]},"host_mass_solar":0.936,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":1.473,"planets_in_system":1,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"G0 V","host_temperature_k":5844,"orbital_period_days":1121.79,"periastron_epoch_bjd":2454947.7,"transit_midpoint_bjd":2451631,"equilibrium_temperature_k":237.89,"argument_of_periastron_deg":77.059},"designations":[{"catalog":"Exoplanet","designation":"HD 114729 b"},{"catalog":"Host star","designation":"HD 114729"}],"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."}