{"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":"2026-09-06T23:22:29.870Z","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":"wasp-78-b","name":"WASP-78 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2460.060571438755,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":63.7562662,"dec_deg":-22.1163901,"epoch_ra_deg":64.046413,"epoch_dec_deg":-22.04853,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-78","semi_major_axis_km":5217973.730016,"periapsis_km":null,"mass_kg":2.1069288658963486e+27,"mass_msun":0.0010596,"constellation":"Eridanus","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/wasp-78-b","radius_km":137979.797197,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-78","host_v_mag":11.965,"eccentricity":0,"uncertainties":{"mass_kg":[1.0249924212468723e+27,1.0249924212468723e+27],"radius_km":[32171.455305000003,32171.455305000003],"distance_ly":[53.4015837235624,55.77926371711746],"host_mass_solar":[1.36,1.36],"inclination_deg":[1.95,1.95],"host_radius_solar":[0.58,0.58],"host_temperature_k":[150,150],"semi_major_axis_km":[113694.381732,104718.50949],"orbital_period_days":[0.000005,0.000005]},"host_mass_solar":1.87,"inclination_deg":83.2,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.46,"planets_in_system":1,"discovery_facility":"SuperWASP","host_temperature_k":6100,"orbital_period_days":2.17518,"transit_midpoint_bjd":2457966.18625,"equilibrium_temperature_k":2469.7},"designations":[{"catalog":"Exoplanet","designation":"WASP-78 b"},{"catalog":"Host star","designation":"WASP-78"}],"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."}