{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.664","julian_year":2026.664,"time":"2026-08-31T16:37:44.990Z","years_from_j2000":26.664,"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-89613","name":"HD 89613","class":"a3_5_white_star","category":"star","object_type":"A3/5 white star","mag":7.01,"mag_band":"V","abs_mag":0.897,"abs_mag_band":"V","distance_ly":544.5014386228396,"distance_method":"parallax","ra_deg":154.75938,"dec_deg":-56.020719,"epoch_ra_deg":155.005185,"epoch_dec_deg":-56.154874,"epoch_moved_arcsec":1.498,"pm_ra_mas_yr":-50.56,"pm_dec_mas_yr":24.46,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Vela","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-89613","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"10190-5601","age_years":356906800,"companions":[{"measured":2016,"magnitude":8.23,"components":null,"discoverer_code":"R   140","separation_arcsec":3.2,"position_angle_deg":282}],"mass_solar":2.486,"radius_solar":2.354,"spectral_type":"A3/5","color_index_bv":0.2,"luminosity_solar":38.124135110429904,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality E)","surface_gravity_log_g":4.11,"surface_temperature_k":9892,"proper_motion_ra_mas_yr":-50.56,"proper_motion_dec_mas_yr":24.46,"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; Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":51.2674},"designations":[{"catalog":"HD","designation":"HD 89613"},{"catalog":"HIP","designation":"HIP 50518"}],"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."}