{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T02:13:23.561Z","years_from_j2000":26.666,"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-129271","name":"HD 129271","class":"g6_8v_yellow_main_sequence_star","category":"star","object_type":"G6/8V yellow main-sequence star","mag":8.04,"mag_band":"V","abs_mag":2.712,"abs_mag_band":"V","distance_ly":379.2517006016298,"distance_method":"parallax","ra_deg":220.51197000000002,"dec_deg":-13.854067,"epoch_ra_deg":220.879249,"epoch_dec_deg":-13.968973,"epoch_moved_arcsec":1.422,"pm_ra_mas_yr":-52.34,"pm_dec_mas_yr":-10.28,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Libra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-129271","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"G6/8V","color_index_bv":0.823,"luminosity_solar":7.164732823911086,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality D)","proper_motion_ra_mas_yr":-52.34,"proper_motion_dec_mas_yr":-10.28},"designations":[{"catalog":"HD","designation":"HD 129271"},{"catalog":"HIP","designation":"HIP 71875"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}