{"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":"2026-09-07T21:29:40.743Z","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-86950-b","name":"HD 86950 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":684.4032814370372,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":150.4066612,"dec_deg":-17.3330699,"epoch_ra_deg":150.727271,"epoch_dec_deg":-17.462216,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 86950","semi_major_axis_km":406906208.304,"periapsis_km":null,"mass_kg":6.833282808312483e+27,"mass_msun":0.00343656,"constellation":"Hydra","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/hd-86950-b","radius_km":82915.3,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 86950","host_v_mag":7.47,"eccentricity":0.17,"uncertainties":{"mass_kg":[1.328693879394094e+27,1.328693879394094e+27],"distance_ly":[6.278510271047311,6.392665003248171],"eccentricity":[0.16,0.16],"host_mass_solar":[0.25,0.25],"host_radius_solar":[0.6,0.6],"host_temperature_k":[100,100],"semi_major_axis_km":[11967829.656,11967829.656],"orbital_period_days":[57,57],"argument_of_periastron_deg":[70,70]},"host_mass_solar":1.66,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":8.8,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_spectral_type":"K1 III","host_temperature_k":4805,"orbital_period_days":1270,"periastron_epoch_bjd":2454245,"equilibrium_temperature_k":416.76,"argument_of_periastron_deg":243},"designations":[{"catalog":"Exoplanet","designation":"HD 86950 b"},{"catalog":"Host star","designation":"HD 86950"}],"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."}