{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T15:18:24.632Z","years_from_j2000":26.683,"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-11506-b","name":"HD 11506 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":167.19102078137985,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":28.2106607,"dec_deg":-19.507396,"epoch_ra_deg":28.53055,"epoch_dec_deg":-19.374686,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 11506","semi_major_axis_km":431589856.96949995,"periapsis_km":null,"mass_kg":9.262848046812797e+27,"mass_msun":0.00465842,"constellation":"Cetus","discovered":"2007","featured":false,"url":"https://spacecatalog.org/object/hd-11506-b","radius_km":82277.49,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 11506","host_v_mag":7.51,"eccentricity":0.379,"uncertainties":{"mass_kg":[6.320754917130158e+26,3.769675455104903e+27],"distance_ly":[0.4380280152735864,0.44063726629532035],"eccentricity":[0.009,0.009],"host_mass_solar":[0.02,0.02],"inclination_deg":[52.7,23.304],"host_radius_solar":[0.02,0.02],"host_temperature_k":[47,47],"semi_major_axis_km":[2393565.9312,2393565.9312],"orbital_period_days":[1.9,1.9],"argument_of_periastron_deg":[1.5,1.5]},"host_mass_solar":1.22,"inclination_deg":112.598,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.24,"planets_in_system":3,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"G0 V","host_temperature_k":6123,"orbital_period_days":1617.7,"periastron_epoch_bjd":2463391.8,"transit_midpoint_bjd":2453398,"equilibrium_temperature_k":193.57,"argument_of_periastron_deg":-140.7},"designations":[{"catalog":"Exoplanet","designation":"HD 11506 b"}],"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."}