{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T00:24:06.651Z","years_from_j2000":26.685,"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-11505-b","name":"HD 11505 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":127.09629111228286,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":28.2750265,"dec_deg":-1.3284416,"epoch_ra_deg":28.617778,"epoch_dec_deg":-1.195815,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 11505","semi_major_axis_km":3028908088.0628996,"periapsis_km":null,"mass_kg":1.499328621346042e+28,"mass_msun":0.00754034,"constellation":"Cetus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-11505-b","radius_km":80364.06,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 11505","host_v_mag":7.43,"eccentricity":0.144,"uncertainties":{"mass_kg":[3.2325061933797234e+27,6.159414326240419e+27],"distance_ly":[0.5267425500125407,0.5309825829228583],"eccentricity":[0.056,0.011],"host_mass_solar":[0.134,0.134],"inclination_deg":[27.648,27.774],"host_radius_solar":[0.058299,0.080997],"host_temperature_k":[165.11,128.93],"semi_major_axis_km":[510577532.69909996,716872996.3943999],"orbital_period_days":[7172.26632,12712.99788],"argument_of_periastron_deg":[63.866,142.348]},"host_mass_solar":1.03,"inclination_deg":87.505,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.19568,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_temperature_k":5757.15,"orbital_period_days":32669.22247,"periastron_epoch_bjd":2445917.145,"equilibrium_temperature_k":67.46,"argument_of_periastron_deg":62.477},"designations":[{"catalog":"Exoplanet","designation":"HD 11505 b"},{"catalog":"Host star","designation":"HD 11505"}],"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."}