{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T18:07:56.904Z","years_from_j2000":26.687,"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-26-b","name":"HATS-26 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2810.955910405313,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":144.9268593,"dec_deg":-28.5856004,"epoch_ra_deg":145.223339,"epoch_dec_deg":-28.706931,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-26","semi_major_axis_km":7083459.177645,"periapsis_km":null,"mass_kg":1.2337871737230871e+27,"mass_msun":0.000620489,"constellation":"Antlia","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/hats-26-b","radius_km":125111.215075,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-26","host_v_mag":13.006,"uncertainties":{"mass_kg":[1.442581926199302e+26,1.442581926199302e+26],"radius_km":[15013.345809,15013.345809],"distance_ly":[77.7785113941118,82.25011533260836],"host_mass_solar":[0.056,0.113],"inclination_deg":[1.9,1.9],"host_radius_solar":[0.11,0.15],"host_temperature_k":[81,81],"semi_major_axis_km":[101726.55207599999,198965.16803099998],"orbital_period_days":[0.0000076,0.0000076]},"host_mass_solar":1.299,"inclination_deg":86.2,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.04,"planets_in_system":1,"discovery_facility":"HATSouth","host_spectral_type":"F","host_temperature_k":6071,"orbital_period_days":3.3023881,"transit_midpoint_bjd":2456867.4232,"eccentricity_upper_limit":0.245,"equilibrium_temperature_k":1918},"designations":[{"catalog":"Exoplanet","designation":"HATS-26 b"},{"catalog":"Host star","designation":"HATS-26"}],"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."}