{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T23:27:33.157Z","years_from_j2000":26.684,"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-11343-c","name":"HD 11343 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":505.9370346779896,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":27.5271962,"dec_deg":-54.4651633,"epoch_ra_deg":27.77736,"epoch_dec_deg":-54.33159,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HIP 8541","semi_major_axis_km":138078834.6561,"periapsis_km":null,"mass_kg":1.5260921782163476e+27,"mass_msun":0.000767494,"constellation":"Eridanus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-11343-c","radius_km":88655.59000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HIP 8541","host_v_mag":7.88,"eccentricity":0.169,"uncertainties":{"mass_kg":[3.036999359610753e+26,3.150886835476713e+26],"distance_ly":[2.067831434724153,2.080877689832823],"eccentricity":[0.102,0.142],"host_mass_solar":[0.115,0.115],"host_radius_solar":[0.09,0.08],"host_temperature_k":[61,61],"semi_major_axis_km":[3291153.1553999996,2842359.5432999996],"orbital_period_days":[3.78842,3.24097],"argument_of_periastron_deg":[57.762,60.92]},"host_mass_solar":2.009,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":6.84,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_spectral_type":"K2 III/IV","host_temperature_k":4672,"orbital_period_days":228.53731,"periastron_epoch_bjd":2454961.962,"equilibrium_temperature_k":613.29,"argument_of_periastron_deg":82.15},"designations":[{"catalog":"Exoplanet","designation":"HD 11343 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."}