{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T16:47:43.519Z","years_from_j2000":26.667,"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-56597","name":"HD 56597","class":"b3iii_blue_white_giant","category":"star","object_type":"B3III blue-white giant","mag":7.74,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":109.28064,"dec_deg":-13.989811,"epoch_ra_deg":109.589244,"epoch_dec_deg":-14.037352,"epoch_moved_arcsec":0.062,"pm_ra_mas_yr":-1.93,"pm_dec_mas_yr":1.28,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Canis Major","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-56597","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07171-1359","companions":[{"measured":2016,"magnitude":11.32,"components":"AB","discoverer_code":"HU  113","separation_arcsec":1.9,"position_angle_deg":53},{"measured":2015,"magnitude":12.7,"components":"AC","discoverer_code":"HU  113","separation_arcsec":8.5,"position_angle_deg":123}],"mass_solar":6.83,"radius_solar":13.501,"spectral_type":"B3III","color_index_bv":-0.015,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality C)","surface_gravity_log_g":2.955,"surface_temperature_k":12726,"proper_motion_ra_mas_yr":-1.93,"proper_motion_dec_mas_yr":1.28,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":3422.301},"designations":[{"catalog":"HD","designation":"HD 56597"},{"catalog":"HIP","designation":"HIP 35263"}],"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."}