{"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":"2026-09-07T17:00:45.795Z","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":"wasp-76-b","name":"WASP-76 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":634.2404305442021,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":26.632936,"dec_deg":2.700389,"epoch_ra_deg":26.980362,"epoch_dec_deg":2.834936,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-76","semi_major_axis_km":4936729.7331,"periapsis_km":null,"mass_kg":1.6969233921944527e+27,"mass_msun":0.000853407,"constellation":"Pisces","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/wasp-76-b","radius_km":132546.16764818202,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-76","host_v_mag":9.518,"eccentricity":0,"uncertainties":{"mass_kg":[2.4675619790865203e+25,2.6573744408538427e+25],"radius_km":[5433.391964593001,5504.883959931],"distance_ly":[19.04427089488065,20.2412648011011],"host_mass_solar":[0.021,0.021],"inclination_deg":[0.034,0.005],"host_radius_solar":[0.071,0.071],"host_temperature_k":[65,65],"semi_major_axis_km":[29919.57414,29919.57414],"orbital_period_days":[5.6e-7,6.4e-7],"argument_of_periastron_deg":[100,25]},"host_mass_solar":1.458,"inclination_deg":89.623,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.756,"planets_in_system":1,"discovery_facility":"SuperWASP","host_spectral_type":"F7","host_temperature_k":6329,"orbital_period_days":1.80988198,"periastron_epoch_bjd":2456107.73,"transit_midpoint_bjd":2458080.626165,"equilibrium_temperature_k":2228,"argument_of_periastron_deg":51},"designations":[{"catalog":"Exoplanet","designation":"WASP-76 b"},{"catalog":"Host star","designation":"WASP-76"}],"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."}