{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-05T21:07:25.779Z","years_from_j2000":26.679,"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":"hd-126511","name":"HD 126511","class":"g5_yellow_star","category":"star","object_type":"G5 yellow star","mag":8.36,"mag_band":"V","abs_mag":5.293,"abs_mag_band":"V","distance_ly":133.8901284601226,"distance_method":"parallax","ra_deg":216.204045,"dec_deg":41.275107,"epoch_ra_deg":216.47069,"epoch_dec_deg":41.151732,"epoch_moved_arcsec":6.969,"pm_ra_mas_yr":-155.89,"pm_dec_mas_yr":-209.6,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Boötes","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-126511","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"radius_solar":0.975,"spectral_type":"G5","uncertainties":{"metallicity_fe_h":[0.02,0.02]},"color_index_bv":0.757,"luminosity_solar":0.6649668571246753,"metallicity_fe_h":0.06,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1998A&AS..129..237F, quality D)","surface_gravity_log_g":4.439,"surface_temperature_k":5409,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-155.89,"proper_motion_dec_mas_yr":-209.6,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.7307},"designations":[{"catalog":"HD","designation":"HD 126511"},{"catalog":"HIP","designation":"HIP 70470"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"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."}