{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T07:54:04.201Z","years_from_j2000":26.677,"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":"hats-24-b","name":"HATS-24 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1611.806110528157,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":268.8907069,"dec_deg":-61.7474,"epoch_ra_deg":269.513049,"epoch_dec_deg":-61.751771,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-24","semi_major_axis_km":3560429.32266,"periapsis_km":null,"mass_kg":4.289783096329503e+27,"mass_msun":0.00215739,"constellation":"Pavo","discovered":"2017","featured":false,"url":"https://spacecatalog.org/object/hats-24-b","radius_km":99731.5114455,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-24","host_v_mag":12.915,"eccentricity":0,"uncertainties":{"mass_kg":[3.226827992814228e+26,3.226827992814228e+26],"radius_km":[4075.0510053,4075.0510053],"distance_ly":[38.74737767274912,40.66517717372357],"host_mass_solar":[0.046,0.032],"inclination_deg":[0.28,0.23],"host_radius_solar":[0.047,0.044],"host_temperature_k":[94,94],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[9e-7,9e-7]},"host_mass_solar":1.07,"inclination_deg":85.97,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.12,"planets_in_system":1,"discovery_facility":"HATSouth","host_spectral_type":"F V","host_temperature_k":6125,"orbital_period_days":1.3484978,"transit_midpoint_bjd":2457948.709321,"equilibrium_temperature_k":2166,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"HATS-24 b"},{"catalog":"Host star","designation":"HATS-24"}],"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."}