{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T22:03:04.652Z","years_from_j2000":26.676,"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-73344-d","name":"HD 73344 d","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":115.00273878292373,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":129.6894456,"dec_deg":23.6852651,"epoch_ra_deg":130.084423,"epoch_dec_deg":23.591137,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 73344","semi_major_axis_km":1002305733.6899999,"periapsis_km":null,"mass_kg":4.840217729379638e+27,"mass_msun":0.00243422,"constellation":"Cancer","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/hd-73344-d","radius_km":84190.92,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 73344","host_v_mag":6.89351,"eccentricity":0.18,"uncertainties":{"mass_kg":[8.731373158880916e+26,1.0629497758637636e+27],"distance_ly":[0.1712320983012903,0.17155825467900704],"eccentricity":[0.12,0.14],"host_mass_solar":[0.05,0.05],"inclination_deg":[17,19],"host_radius_solar":[0.03,0.03],"host_temperature_k":[100,100],"semi_major_axis_km":[38895446.382,37399467.675],"orbital_period_days":[308,312],"argument_of_periastron_deg":[79,57.3]},"host_mass_solar":1.19,"inclination_deg":59,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.22,"planets_in_system":3,"discovery_facility":"Multiple Observatories","host_spectral_type":"F6 V","host_temperature_k":6148,"orbital_period_days":5823,"periastron_epoch_bjd":2458061,"transit_midpoint_bjd":2444345,"equilibrium_temperature_k":126.51,"argument_of_periastron_deg":58.9},"designations":[{"catalog":"Exoplanet","designation":"HD 73344 d"}],"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."}