{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T14:50:41.748Z","years_from_j2000":26.686,"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-69123-b","name":"HD 69123 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":244.99562468570898,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":123.55499,"dec_deg":-35.4899246,"epoch_ra_deg":123.809478,"epoch_dec_deg":-35.570963,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 69123","semi_major_axis_km":371301915.0774,"periapsis_km":null,"mass_kg":5.865205013248267e+27,"mass_msun":0.0029497,"constellation":"Puppis","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-69123-b","radius_km":83553.11,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 69123","host_v_mag":5.77,"eccentricity":0.19,"uncertainties":{"mass_kg":[5.504561339294489e+26,1.1768372518491668e+27],"distance_ly":[1.149538153262662,1.149538153262662],"eccentricity":[0.06,0.06],"host_mass_solar":[0.09,0.09],"inclination_deg":[19,14],"host_radius_solar":[0.15,0.15],"host_temperature_k":[41,41],"semi_major_axis_km":[1495978.707,1495978.707],"orbital_period_days":[7,7],"argument_of_periastron_deg":[21.7,21.7]},"host_mass_solar":1.68,"inclination_deg":70,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":7.72,"planets_in_system":1,"discovery_facility":"La Silla Observatory","host_spectral_type":"K1 III","host_temperature_k":4842,"orbital_period_days":1193.3,"periastron_epoch_bjd":2455715.7,"equilibrium_temperature_k":411.78,"argument_of_periastron_deg":-67.3},"designations":[{"catalog":"Exoplanet","designation":"HD 69123 b"},{"catalog":"Host star","designation":"HD 69123"}],"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."}