{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T07:03:00.031Z","years_from_j2000":26.683,"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-87-b","name":"WASP-87 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":973.224538596545,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":185.3246821,"dec_deg":-52.8408163,"epoch_ra_deg":185.684883,"epoch_dec_deg":-52.989922,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-87","semi_major_axis_km":4407153.270822,"periapsis_km":null,"mass_kg":4.1379323672558926e+27,"mass_msun":0.00208103,"constellation":"Centaurus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/wasp-87-b","radius_km":99016.5902165,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-87","host_v_mag":10.727,"eccentricity":0,"uncertainties":{"mass_kg":[2.8472011701302012e+26,2.8472011701302012e+26],"radius_km":[4289.527374,4289.527374],"distance_ly":[11.532889516064047,11.813384000900447],"host_mass_solar":[0.093,0.093],"inclination_deg":[0.63,0.63],"host_radius_solar":[0.062,0.062],"host_temperature_k":[120,120],"semi_major_axis_km":[112198.40302499999,112198.40302499999],"orbital_period_days":[0.0000019,0.0000019]},"host_mass_solar":1.204,"inclination_deg":81.07,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.627,"planets_in_system":1,"discovery_facility":"Anglo-Australian Telescope","host_temperature_k":6450,"orbital_period_days":1.682795,"transit_midpoint_bjd":2457082.07656,"equilibrium_temperature_k":2049.54},"designations":[{"catalog":"Exoplanet","designation":"WASP-87 b"},{"catalog":"Host star","designation":"WASP-87"}],"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."}