{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T13:47:35.195Z","years_from_j2000":26.681,"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-83443-c","name":"HD 83443 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":133.3950230787486,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":144.2994103,"dec_deg":-43.272721,"epoch_ra_deg":144.559783,"epoch_dec_deg":-43.393039,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 83443","semi_major_axis_km":1196782965.6,"periapsis_km":null,"mass_kg":2.847186899635081e+27,"mass_msun":0.00143189,"constellation":"Vela","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-83443-c","radius_km":86742.16,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 83443","host_v_mag":8.23,"eccentricity":0.76,"uncertainties":{"mass_kg":[3.7962491995134415e+26,9.490622998783604e+26],"distance_ly":[0.20417389245068138,0.20482620520611486],"eccentricity":[0.047,0.046],"host_mass_solar":[0.03,0.03],"host_radius_solar":[0.02,0.02],"host_temperature_k":[17,17],"semi_major_axis_km":[119678296.56,119678296.56],"orbital_period_days":[530,1019],"argument_of_periastron_deg":[5.7,5.6]},"host_mass_solar":1,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.94,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_spectral_type":"K0 V","host_temperature_k":5442,"orbital_period_days":8241,"equilibrium_temperature_k":89.95,"argument_of_periastron_deg":118.2},"designations":[{"catalog":"Exoplanet","designation":"HD 83443 c"}],"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."}