{"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":"2026-09-07T04:13:16.068Z","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":"hats-6-b","name":"HATS-6 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":552.2414556224356,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":88.1468079,"dec_deg":-19.0316268,"epoch_ra_deg":88.43951,"epoch_dec_deg":-19.024875,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-6","semi_major_axis_km":5419930.8554609995,"periapsis_km":null,"mass_kg":6.055047821810228e+26,"mass_msun":0.000304517,"constellation":"Lepus","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/hats-6-b","radius_km":71349.1386542,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-6","host_v_mag":15.044,"eccentricity":0,"uncertainties":{"mass_kg":[1.328693879394094e+26,1.328693879394094e+26],"radius_km":[1358.3503351,1358.3503351],"distance_ly":[3.427903529802973,3.473565422683317],"host_mass_solar":[0.027,0.02],"inclination_deg":[0.084,0.084],"host_radius_solar":[0.011,0.011],"host_temperature_k":[18,18],"semi_major_axis_km":[85270.78629899998,62831.105694],"orbital_period_days":[0.0000021,0.0000021]},"host_mass_solar":0.574,"inclination_deg":88.21,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.57,"planets_in_system":1,"discovery_facility":"HATSouth","host_spectral_type":"M1 V","host_temperature_k":3724,"orbital_period_days":3.3252725,"transit_midpoint_bjd":2456643.74058,"equilibrium_temperature_k":712.8},"designations":[{"catalog":"Exoplanet","designation":"HATS-6 b"},{"catalog":"Host star","designation":"HATS-6"}],"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."}