{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T03:06:42.408Z","years_from_j2000":26.682,"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-132563-b","name":"HD 132563 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":342.96973898804157,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":224.5892892,"dec_deg":44.0428571,"epoch_ra_deg":224.833524,"epoch_dec_deg":43.934946,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 132563","semi_major_axis_km":391946421.23399997,"periapsis_km":null,"mass_kg":2.8281021772890043e+27,"mass_msun":0.00142229,"constellation":"Boötes","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/hd-132563-b","radius_km":86742.16,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 132563","host_v_mag":8.928001,"eccentricity":0.22,"uncertainties":{"mass_kg":[1.708249036063707e+26,1.708249036063707e+26],"distance_ly":[0.9197609851612164,0.9197609851612164],"eccentricity":[0.09,0.09],"host_mass_solar":[0.152453,0.21701],"host_radius_solar":[0.043737,0.070685],"host_temperature_k":[128.13,128.13],"semi_major_axis_km":[5983914.828,5983914.828],"orbital_period_days":[34,34],"argument_of_periastron_deg":[35,35]},"host_mass_solar":1.231,"stars_in_system":3,"discovery_method":"Radial Velocity","host_radius_solar":1.29577,"planets_in_system":1,"discovery_facility":"Roque de los Muchachos Observatory","host_spectral_type":"F8","host_temperature_k":6289,"orbital_period_days":1544,"periastron_epoch_bjd":2452593,"equilibrium_temperature_k":213.27,"argument_of_periastron_deg":158},"designations":[{"catalog":"Exoplanet","designation":"HD 132563 b"},{"catalog":"Host star","designation":"HD 132563"}],"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."}