{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T03:55:56.373Z","years_from_j2000":26.682,"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":"gj-676-a-b","name":"GJ 676 A b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":52.2737349694179,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":262.5448903,"dec_deg":-51.6377777,"epoch_ra_deg":263.076321,"epoch_dec_deg":-51.658776,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 676 A","semi_major_axis_km":259552305.6645,"periapsis_km":null,"mass_kg":1.0993937681767038e+28,"mass_msun":0.00552901,"constellation":"Ara","discovered":"2010","featured":false,"url":"https://spacecatalog.org/object/gj-676-a-b","radius_km":81639.68000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 676 A","host_v_mag":9.58,"eccentricity":0.319,"uncertainties":{"mass_kg":[9.054054340899279e+26,8.902204372679855e+26],"distance_ly":[0.032941794149391086,0.032941794149391086],"eccentricity":[0.003,0.003],"host_mass_solar":[0.063,0.063],"inclination_deg":[2.781,3.312],"host_radius_solar":[0.07,0.07],"host_temperature_k":[181,181],"semi_major_axis_km":[8975872.241999999,8377480.759199999],"orbital_period_days":[0.40023,0.37707],"argument_of_periastron_deg":[0.601,0.628]},"host_mass_solar":0.626,"inclination_deg":48.919,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":0.69,"planets_in_system":4,"discovery_facility":"La Silla Observatory","host_spectral_type":"M0","host_temperature_k":3734,"orbital_period_days":1051.44521,"periastron_epoch_bjd":2453307.813,"equilibrium_temperature_k":113.55,"argument_of_periastron_deg":87.073},"designations":[{"catalog":"Exoplanet","designation":"GJ 676 A b"}],"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."}