{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T10:24:59.139Z","years_from_j2000":26.68,"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-26-b","name":"HAT-P-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":462.61042146209735,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":213.1565508,"dec_deg":4.0594175,"epoch_ra_deg":213.495147,"epoch_dec_deg":3.933195,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HAT-P-26","semi_major_axis_km":7102906.900835999,"periapsis_km":null,"mass_kg":1.328693879394094e+26,"mass_msun":0.0000668219,"constellation":"Virgo","discovered":"2010","featured":false,"url":"https://spacecatalog.org/object/hat-p-26-b","radius_km":45040.037427,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HAT-P-26","host_v_mag":11.757,"eccentricity":0.12,"uncertainties":{"mass_kg":[3.796268226840268e+25,3.796268226840268e+25],"radius_km":[2859.684916,2859.684916],"distance_ly":[3.695351759530703,3.757321471296884],"eccentricity":[0.06,0.06],"host_mass_solar":[0.36,0.36],"inclination_deg":[0.7,0.7],"host_radius_solar":[0.05,0.05],"host_temperature_k":[88,88],"semi_major_axis_km":[89758.72241999999,89758.72241999999],"orbital_period_days":[0.000015,0.000015],"argument_of_periastron_deg":[71,33]},"host_mass_solar":1.12,"inclination_deg":88.6,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.87,"planets_in_system":1,"discovery_facility":"HATNet","host_spectral_type":"K1","host_temperature_k":5079,"orbital_period_days":4.23452,"transit_midpoint_bjd":2456901.059458,"equilibrium_temperature_k":1080,"argument_of_periastron_deg":46},"designations":[{"catalog":"Exoplanet","designation":"HAT-P-26 b"},{"catalog":"Host star","designation":"HAT-P-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."}