{"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":"2026-09-07T14:06:59.316Z","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-144-b","name":"WASP-144 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1159.528323112126,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":320.7628761,"dec_deg":-40.0484393,"epoch_ra_deg":321.187641,"epoch_dec_deg":-39.933683,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-144","semi_major_axis_km":4727292.71412,"periapsis_km":null,"mass_kg":8.35179009904859e+26,"mass_msun":0.000420024,"constellation":"Microscopium","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/wasp-144-b","radius_km":60768.304465,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-144","host_v_mag":13.085,"eccentricity":0,"uncertainties":{"mass_kg":[1.1388804680520805e+26,1.1388804680520805e+26],"radius_km":[3574.606145,3574.606145],"distance_ly":[32.8602550549619,34.794362374822185],"host_mass_solar":[0.04,0.04],"inclination_deg":[0.5,0.5],"host_radius_solar":[0.04,0.04],"host_temperature_k":[140,140],"semi_major_axis_km":[74798.93535,74798.93535],"orbital_period_days":[0.0000013,0.0000013]},"host_mass_solar":0.81,"inclination_deg":86.9,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.81,"planets_in_system":1,"discovery_facility":"SuperWASP-South","host_spectral_type":"K2 V","host_temperature_k":5200,"orbital_period_days":2.2783152,"transit_midpoint_bjd":2457157.27493,"equilibrium_temperature_k":1260},"designations":[{"catalog":"Exoplanet","designation":"WASP-144 b"},{"catalog":"Host star","designation":"WASP-144"}],"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."}