{"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":"2026-09-07T22:54:05.610Z","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-11506-d","name":"HD 11506 d","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":28.530563,"epoch_dec_deg":-19.374679,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 11506","semi_major_axis_km":2722681246.74,"periapsis_km":null,"mass_kg":2.4295994876886025e+28,"mass_msun":0.0122188,"constellation":"Cetus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-11506-d","radius_km":78450.63,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 11506","host_v_mag":7.51,"eccentricity":0.29,"uncertainties":{"mass_kg":[9.490622998783604e+26,1.1388747598540323e+27],"distance_ly":[0.4380280152735864,0.44063726629532035],"eccentricity":[0.03,0.02],"host_mass_solar":[0.02,0.02],"inclination_deg":[5,6],"host_radius_solar":[0.02,0.02],"host_temperature_k":[47,47],"semi_major_axis_km":[13463808.362999998,8975872.241999999],"orbital_period_days":[300,300],"argument_of_periastron_deg":[4,6]},"host_mass_solar":1.22,"inclination_deg":90,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.24,"planets_in_system":3,"discovery_facility":"Multiple Observatories","host_spectral_type":"G0 V","host_temperature_k":6123,"orbital_period_days":26500,"periastron_epoch_bjd":2449521.783,"transit_midpoint_bjd":2452015.5,"equilibrium_temperature_k":77.07,"argument_of_periastron_deg":111},"designations":[{"catalog":"Exoplanet","designation":"HD 11506 d"},{"catalog":"Host star","designation":"HD 11506"}],"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."}