{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-02T03:04:02.375Z","years_from_j2000":26.668,"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","name":"WASP-87","class":"star","category":"star","object_type":null,"mag":10.727,"mag_band":"V","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":185.684609,"epoch_dec_deg":-52.989817,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Centaurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/wasp-87","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"12213-5250","companions":[{"measured":2016,"magnitude":20.2,"components":"AB","discoverer_code":"WSP  87","separation_arcsec":4.1,"position_angle_deg":202},{"measured":2016,"magnitude":17.7,"components":"AC","discoverer_code":"WSP  87","separation_arcsec":5.6,"position_angle_deg":241},{"measured":2016,"magnitude":20.6,"components":"AP","discoverer_code":"WSP  87","separation_arcsec":7.7,"position_angle_deg":238},{"measured":2016,"magnitude":12.9,"components":"AD","discoverer_code":"WSP  87","separation_arcsec":8.1,"position_angle_deg":141},{"measured":2016,"magnitude":20.5,"components":"AE","discoverer_code":"WSP  87","separation_arcsec":11.9,"position_angle_deg":280},{"measured":2016,"magnitude":19.4,"components":"AF","discoverer_code":"WSP  87","separation_arcsec":12.3,"position_angle_deg":9},{"measured":2016,"magnitude":20.6,"components":"AQ","discoverer_code":"WSP  87","separation_arcsec":13.8,"position_angle_deg":276},{"measured":2016,"magnitude":19.1,"components":"AG","discoverer_code":"WSP  87","separation_arcsec":14.3,"position_angle_deg":311},{"measured":2016,"magnitude":20.9,"components":"AH","discoverer_code":"WSP  87","separation_arcsec":14.9,"position_angle_deg":16},{"measured":2016,"magnitude":20,"components":"AR","discoverer_code":"WSP  87","separation_arcsec":15.2,"position_angle_deg":325},{"measured":2016,"magnitude":20.8,"components":"AI","discoverer_code":"WSP  87","separation_arcsec":16,"position_angle_deg":288},{"measured":2015,"magnitude":15.07,"components":"AJ","discoverer_code":"WSP  87","separation_arcsec":20.9,"position_angle_deg":95},{"measured":2016,"magnitude":19.8,"components":"AK","discoverer_code":"WSP  87","separation_arcsec":22.8,"position_angle_deg":47},{"measured":2016,"magnitude":20,"components":"AL","discoverer_code":"WSP  87","separation_arcsec":23.3,"position_angle_deg":326},{"measured":2016,"magnitude":19.6,"components":"AM","discoverer_code":"WSP  87","separation_arcsec":23.6,"position_angle_deg":42},{"measured":2016,"magnitude":20.1,"components":"AN","discoverer_code":"WSP  87","separation_arcsec":24.4,"position_angle_deg":219},{"measured":2015,"magnitude":18.8,"components":"AO","discoverer_code":"WSP  87","separation_arcsec":31.3,"position_angle_deg":48}],"mass_solar":1.204,"radius_solar":1.627,"uncertainties":{"metallicity_fe_h":[0.04,0.04]},"stars_in_system":2,"metallicity_fe_h":-0.21,"planets_in_system":1,"surface_gravity_log_g":4.06,"surface_temperature_k":6450,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","stellar_parameters_method":"NASA Exoplanet Archive composite parameters"},"designations":[],"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":"2026-09-01T22:58:55.274Z","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."}