{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T09:44:57.951Z","years_from_j2000":26.675,"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-30669-b","name":"HD 30669 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":189.44597505850413,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":72.1198522,"dec_deg":-28.4190757,"epoch_ra_deg":72.387346,"epoch_dec_deg":-28.371323,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 30669","semi_major_axis_km":402418272.18299997,"periapsis_km":null,"mass_kg":8.920627144119983e+26,"mass_msun":0.000448631,"constellation":"Caelum","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/hd-30669-b","radius_km":91206.83000000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 30669","host_v_mag":9.12,"eccentricity":0.18,"uncertainties":{"mass_kg":[1.138892412387816e+26,1.138892412387816e+26],"distance_ly":[0.28571298687986724,0.2863652996353007],"eccentricity":[0.15,0.15],"host_mass_solar":[0.03,0.03],"host_radius_solar":[0.04,0.04],"host_temperature_k":[74,74],"semi_major_axis_km":[11967829.656,11967829.656],"orbital_period_days":[61,61],"argument_of_periastron_deg":[36,43]},"host_mass_solar":0.92,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.91,"planets_in_system":1,"discovery_facility":"La Silla Observatory","host_spectral_type":"G9 V","host_temperature_k":5400,"orbital_period_days":1684,"periastron_epoch_bjd":2457181,"equilibrium_temperature_k":151.45,"argument_of_periastron_deg":82},"designations":[{"catalog":"Exoplanet","designation":"HD 30669 b"},{"catalog":"Host star","designation":"HD 30669"}],"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."}