{"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":"2026-09-07T13:18:39.921Z","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":"hats-72-b","name":"HATS-72 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":416.1396607650158,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":339.0258401,"dec_deg":-17.0003046,"epoch_ra_deg":339.386917,"epoch_dec_deg":-16.861284,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-72","semi_major_axis_km":9950801.5653519,"periapsis_km":null,"mass_kg":2.3802601782288483e+26,"mass_msun":0.000119707,"constellation":"Aquarius","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hats-72-b","radius_km":51645.909582960005,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-72","host_v_mag":12.324,"uncertainties":{"mass_kg":[7.402723042338524e+24,7.402723042338524e+24],"radius_km":[228.77479328,228.77479328],"distance_ly":[1.9862923402949673,2.0026001591808047],"host_mass_solar":[0.0028,0.0028],"inclination_deg":[0.05,0.07],"host_radius_solar":[0.0021,0.0021],"host_temperature_k":[8.9,8.9],"semi_major_axis_km":[12715.819009499999,12715.819009499999],"orbital_period_days":[0.0000016,0.0000016]},"host_mass_solar":0.7311,"inclination_deg":89.56,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.7214,"planets_in_system":1,"discovery_facility":"HATSouth","host_temperature_k":4656.1,"orbital_period_days":7.3279474,"transit_midpoint_bjd":2458087.64782,"eccentricity_upper_limit":0.013,"equilibrium_temperature_k":739.3},"designations":[{"catalog":"Exoplanet","designation":"HATS-72 b"},{"catalog":"Host star","designation":"HATS-72"}],"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."}