{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T06:20:25.444Z","years_from_j2000":26.669,"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-16586","name":"HD 16586","class":"a9v_white_main_sequence_star","category":"star","object_type":"A9V white main-sequence star","mag":8.4,"mag_band":"V","abs_mag":3.171,"abs_mag_band":"V","distance_ly":362.3959390012285,"distance_method":"parallax","ra_deg":39.70475999999999,"dec_deg":-25.365763,"epoch_ra_deg":40.00461,"epoch_dec_deg":-25.249591,"epoch_moved_arcsec":1.001,"pm_ra_mas_yr":36.9,"pm_dec_mas_yr":-6.88,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Fornax","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-16586","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":977143650,"mass_solar":1.451,"radius_solar":1.538,"spectral_type":"A9V","color_index_bv":0.33,"luminosity_solar":4.694615193825911,"radial_velocity_km_s":17,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality C)","surface_gravity_log_g":4.092,"surface_temperature_k":7034,"proper_motion_ra_mas_yr":36.9,"proper_motion_dec_mas_yr":-6.88,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":5.0883},"designations":[{"catalog":"HD","designation":"HD 16586"},{"catalog":"HIP","designation":"HIP 12333"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}