{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T01:26:04.623Z","years_from_j2000":26.682,"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-36-b","name":"HAT-P-36 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":960.2663457098588,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":188.2662048,"dec_deg":44.9153672,"epoch_ra_deg":188.590897,"epoch_dec_deg":44.767076,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HAT-P-36","semi_major_axis_km":3605308.68387,"periapsis_km":null,"mass_kg":3.5081314684230916e+27,"mass_msun":0.00176429,"constellation":"Canes Venatici","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/hat-p-36-b","radius_km":91295.44094330001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HAT-P-36","host_v_mag":12.146,"eccentricity":0.063,"uncertainties":{"mass_kg":[1.6513766786755167e+26,1.6513766786755167e+26],"radius_km":[1429.842458,1429.842458],"distance_ly":[7.289595041969215,7.400488210392909],"eccentricity":[0.023,0.021],"host_mass_solar":[0.03,0.03],"inclination_deg":[0.13,0.004],"host_radius_solar":[0.013,0.013],"host_temperature_k":[40,40],"semi_major_axis_km":[70310.999229,70310.999229],"orbital_period_days":[4.8e-7,4.8e-7],"argument_of_periastron_deg":[19,20]},"host_mass_solar":1.03,"inclination_deg":87.13,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.041,"planets_in_system":1,"discovery_facility":"HATNet","host_spectral_type":"G5 V","host_temperature_k":5620,"orbital_period_days":1.32734683,"periastron_epoch_bjd":2456698.61,"transit_midpoint_bjd":2457885.383994,"equilibrium_temperature_k":1780.97,"argument_of_periastron_deg":51},"designations":[{"catalog":"Exoplanet","designation":"HAT-P-36 b"},{"catalog":"Host star","designation":"HAT-P-36"}],"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."}