{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T12:59:56.004Z","years_from_j2000":26.672,"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-128385","name":"HD 128385","class":"f5_yellow_white_star","category":"star","object_type":"F5 yellow-white star","mag":6.6,"mag_band":"V","abs_mag":4.248,"abs_mag_band":"V","distance_ly":96.3250676565967,"distance_method":"parallax","ra_deg":218.39791499999998,"dec_deg":65.395425,"epoch_ra_deg":218.544325,"epoch_dec_deg":65.277291,"epoch_moved_arcsec":1.903,"pm_ra_mas_yr":55.42,"pm_dec_mas_yr":44.96,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Draco","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-128385","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"F5","uncertainties":{"metallicity_fe_h":[0.1,0.1]},"color_index_bv":0.504,"luminosity_solar":1.7410049263526066,"metallicity_fe_h":-0.33,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2000A&AS..141..491C, quality D)","surface_gravity_log_g":4.12,"surface_temperature_k":6084,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":55.42,"proper_motion_dec_mas_yr":44.96,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 128385"},{"catalog":"HIP","designation":"HIP 71192"}],"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."}