{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T21:51:55.590Z","years_from_j2000":26.673,"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":"roxs-12-b","name":"ROXs 12 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":445.6926901499299,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":246.6167993,"dec_deg":-25.446695,"epoch_ra_deg":247.025922,"epoch_dec_deg":-25.507645,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"ROXs 12","semi_major_axis_km":31415552846.999996,"periapsis_km":null,"mass_kg":3.0368473607719165e+28,"mass_msun":0.0152727,"constellation":"Scorpius","discovered":"2013","featured":false,"url":"https://spacecatalog.org/object/roxs-12-b","radius_km":77812.82,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"ROXs 12","host_v_mag":14.763,"uncertainties":{"mass_kg":[7.590625359962843e+27,7.590625359962843e+27],"distance_ly":[2.5407581824134313,2.5701122564079384],"host_mass_solar":[0.08,0.08],"host_radius_solar":[0.137061,0.154798],"host_temperature_k":[70,100],"semi_major_axis_km":[2991957414,2991957414]},"host_mass_solar":0.87,"stars_in_system":2,"discovery_method":"Imaging","host_radius_solar":1.06627,"planets_in_system":1,"discovery_facility":"W. M. Keck Observatory","host_spectral_type":"M0","host_temperature_k":3850,"eccentricity_upper_limit":0.83,"equilibrium_temperature_k":13.23},"designations":[{"catalog":"Exoplanet","designation":"ROXs 12 b"},{"catalog":"Host star","designation":"ROXs 12"}],"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."}