{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T16:13:20.143Z","years_from_j2000":26.686,"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":"1rxs-j160929-1-210524-b","name":"1RXS J160929.1-210524 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":453.79767613619094,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":242.3762343,"dec_deg":-21.0831403,"epoch_ra_deg":242.77141,"epoch_dec_deg":-21.154102,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"1RXS J160929.1-210524","semi_major_axis_km":49367297330.99999,"periapsis_km":null,"mass_kg":1.7916503603374138e+28,"mass_msun":0.00901047,"constellation":"Scorpius","discovered":"2008","featured":false,"url":"https://spacecatalog.org/object/1rxs-j160929-1-210524-b","radius_km":118932.4307,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"1RXS J160929.1-210524","host_v_mag":12.618,"uncertainties":{"mass_kg":[1.7916503603374137e+27,1.7916503603374137e+27],"distance_ly":[4.2628638567578365,4.344402951187022],"host_mass_solar":[0.1,0.2],"host_radius_solar":[0.102363,0.176833],"host_temperature_k":[200,300]},"host_mass_solar":0.85,"stars_in_system":1,"discovery_method":"Imaging","host_radius_solar":1.31316,"planets_in_system":1,"discovery_facility":"Gemini Observatory","host_spectral_type":"K7 V","host_temperature_k":4060,"equilibrium_temperature_k":1700},"designations":[{"catalog":"Exoplanet","designation":"1RXS J160929.1-210524 b"},{"catalog":"Host star","designation":"1RXS J160929.1-210524"}],"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."}