{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T19:55:33.627Z","years_from_j2000":26.67,"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-36879","name":"HD 36879","class":"o7v_n_f_z_blue_main_sequence_star","category":"star","object_type":"O7V(n)((f))z blue main-sequence star","mag":7.56,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":83.91886500000001,"dec_deg":21.403257,"epoch_ra_deg":84.321058,"epoch_dec_deg":21.420802,"epoch_moved_arcsec":0.258,"pm_ra_mas_yr":-5.6,"pm_dec_mas_yr":-7.91,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-36879","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"05357+2124","companions":[{"measured":2015,"magnitude":10.8,"components":null,"discoverer_code":"MZA  17","separation_arcsec":9.3,"position_angle_deg":268}],"spectral_type":"O7V(n)((f))z","color_index_bv":0.133,"radial_velocity_km_s":26.6,"spectral_type_source":"SIMBAD (2014ApJS..211...10S, quality C)","proper_motion_ra_mas_yr":-5.6,"proper_motion_dec_mas_yr":-7.91},"designations":[{"catalog":"HD","designation":"HD 36879"},{"catalog":"HIP","designation":"HIP 26272"}],"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."}