{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-09-01T00:03:39.017Z","years_from_j2000":26.665,"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":"gam-lib-c","name":"γ Lib c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":154.60366769615757,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":233.8818636,"dec_deg":-14.789502,"epoch_ra_deg":234.25753,"epoch_dec_deg":-14.879082,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"γ Lib","semi_major_axis_km":346767864.2826,"periapsis_km":null,"mass_kg":9.929089781345323e+27,"mass_msun":0.00499348,"constellation":"Libra","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/gam-lib-c","radius_km":81639.68000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"γ Lib","host_v_mag":3.90672,"eccentricity":0.065,"uncertainties":{"mass_kg":[2.790243161702101e+26,2.2777495197080647e+26],"distance_ly":[2.9629676133677556,2.9629676133677556],"eccentricity":[0.022,0.033],"host_mass_solar":[0.24,0.24],"host_radius_solar":[0.24,0.3],"semi_major_axis_km":[448793.61209999997,598391.4828],"orbital_period_days":[1.96,2.27],"argument_of_periastron_deg":[21,26]},"host_mass_solar":1.78,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":12.38,"planets_in_system":2,"discovery_facility":"Okayama Astrophysical Observatory","host_spectral_type":"K0 III","host_temperature_k":4879,"orbital_period_days":966.49,"periastron_epoch_bjd":2455563.8,"equilibrium_temperature_k":543.71,"argument_of_periastron_deg":152.6},"designations":[{"catalog":"Exoplanet","designation":"gam Lib c"},{"catalog":"Host star","designation":"gam Lib"}],"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":"2026-08-30T09:56:50.739Z","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."}