{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T21:57:47.011Z","years_from_j2000":26.654,"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-76376","name":"HD 76376","class":"k2_3iii_orange_giant","category":"star","object_type":"K2/3III orange giant","mag":5.75,"mag_band":"V","abs_mag":0.07,"abs_mag_band":"V","distance_ly":446.17833699635014,"distance_method":"parallax","ra_deg":133.801785,"dec_deg":-18.241189,"epoch_ra_deg":134.109776,"epoch_dec_deg":-18.343201,"epoch_moved_arcsec":0.513,"pm_ra_mas_yr":17.87,"pm_dec_mas_yr":7.11,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Hydra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-76376","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08552-1814","age_years":621904850,"companions":[{"measured":2012,"magnitude":7.24,"components":null,"discoverer_code":"S   585","separation_arcsec":64.2,"position_angle_deg":151}],"mass_solar":2.505,"radius_solar":24.436,"spectral_type":"K2/3III","uncertainties":{"metallicity_fe_h":[0.05,0.05]},"color_index_bv":1.327,"luminosity_solar":81.65823713585922,"metallicity_fe_h":-0.03,"radial_velocity_km_s":37,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality D)","surface_gravity_log_g":1.735,"surface_temperature_k":4298,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":17.87,"proper_motion_dec_mas_yr":7.11,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":161.6715},"designations":[{"catalog":"HD","designation":"HD 76376"},{"catalog":"HIP","designation":"HIP 43798"},{"catalog":"HR","designation":"HR 3554"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T19:16:43.430Z","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."}