{"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":"2026-09-05T09:18:59.436Z","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-49-b","name":"HATS-49 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1058.0936896422188,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":6.6135927,"dec_deg":-56.3442798,"epoch_ra_deg":6.934725,"epoch_dec_deg":-56.195522,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-49","semi_major_axis_km":6754343.862105,"periapsis_km":null,"mass_kg":6.700413420373073e+26,"mass_msun":0.000336973,"constellation":"Phoenix","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hats-49-b","radius_km":54691.474018500005,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-49","host_v_mag":14.988,"uncertainties":{"mass_kg":[5.124962106234362e+25,7.21290963099651e+25],"radius_km":[929.3975977000001,929.3975977000001],"distance_ly":[7.674459567674973,7.785352736098665],"host_mass_solar":[0.0075,0.0075],"inclination_deg":[0.11,0.16],"host_radius_solar":[0.0055,0.0055],"host_temperature_k":[15,15],"semi_major_axis_km":[23935.659312,23935.659312],"orbital_period_days":[0.0000037,0.0000037]},"host_mass_solar":0.7133,"inclination_deg":88.27,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.6977,"planets_in_system":1,"discovery_facility":"HATSouth","host_temperature_k":4405,"orbital_period_days":4.1480467,"transit_midpoint_bjd":2457105.1648,"eccentricity_upper_limit":0.071,"equilibrium_temperature_k":834.8},"designations":[{"catalog":"Exoplanet","designation":"HATS-49 b"},{"catalog":"Host star","designation":"HATS-49"}],"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."}