{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T04:10:44.530Z","years_from_j2000":26.677,"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-80883-b","name":"HD 80883 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":112.85369441014811,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":139.9331831,"dec_deg":-59.4780815,"epoch_ra_deg":140.111017,"epoch_dec_deg":-59.591193,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 80883","semi_major_axis_km":966701440.4633999,"periapsis_km":null,"mass_kg":1.0439685298661964e+28,"mass_msun":0.00525027,"constellation":"Carina","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-80883-b","radius_km":81639.68000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 80883","host_v_mag":8.6,"eccentricity":0.203,"uncertainties":{"mass_kg":[2.004419577331153e+27,2.3346932577007663e+27],"distance_ly":[0.1872137608094107,0.1878660735648442],"eccentricity":[0.121,0.185],"host_mass_solar":[0.106,0.106],"inclination_deg":[11.284,7.864],"host_radius_solar":[0.050564,0.056396],"host_temperature_k":[125.08,157.12],"semi_major_axis_km":[120276688.0428,275708875.70009995],"orbital_period_days":[1084.85967,2891.20808],"argument_of_periastron_deg":[34.424,44.098]},"host_mass_solar":0.88,"inclination_deg":141.312,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.814842,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_temperature_k":5177.91,"orbital_period_days":6383.78352,"periastron_epoch_bjd":2452704.209,"equilibrium_temperature_k":88.66,"argument_of_periastron_deg":231.408},"designations":[{"catalog":"Exoplanet","designation":"HD 80883 b"},{"catalog":"Host star","designation":"HD 80883"}],"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."}