{"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":"2026-09-07T11:17:13.926Z","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":"hat-p-24-b","name":"HAT-P-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":1354.6709454638308,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":108.8251171,"dec_deg":14.2626064,"epoch_ra_deg":109.205448,"epoch_dec_deg":14.216046,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HAT-P-24","semi_major_axis_km":6957796.966256999,"periapsis_km":null,"mass_kg":1.4236005850651005e+27,"mass_msun":0.000715949,"constellation":"Gemini","discovered":"2010","featured":false,"url":"https://spacecatalog.org/object/hat-p-24-b","radius_km":92939.75977,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HAT-P-24","host_v_mag":11.762,"eccentricity":0.07,"uncertainties":{"mass_kg":[4.745335283550335e+26,4.745335283550335e+26],"radius_km":[15013.345809,15013.345809],"distance_ly":[20.98816290607244,21.643737225283093],"eccentricity":[0.02,0.02],"host_mass_solar":[0.69,0.69],"inclination_deg":[0.7,0.7],"host_radius_solar":[0.22,0.22],"host_temperature_k":[80,80],"semi_major_axis_km":[83774.80759199998,82278.828885],"orbital_period_days":[0.000007,0.000007],"argument_of_periastron_deg":[36,36]},"host_mass_solar":1.37,"inclination_deg":88.6,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.38,"planets_in_system":1,"discovery_facility":"HATNet","host_spectral_type":"F8","host_temperature_k":6373,"orbital_period_days":3.35524,"transit_midpoint_bjd":2458491.695717,"equilibrium_temperature_k":1637,"argument_of_periastron_deg":197},"designations":[{"catalog":"Exoplanet","designation":"HAT-P-24 b"},{"catalog":"Host star","designation":"HAT-P-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."}