{"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":"2026-09-01T19:06:12.940Z","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-57732","name":"HD 57732","class":"b9_9_5iv_v_blue_white_subgiant","category":"star","object_type":"B9/9.5IV/V blue-white subgiant","mag":9.24,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":110.65568999999999,"dec_deg":1.240871,"epoch_ra_deg":111.002615,"epoch_dec_deg":1.18986,"epoch_moved_arcsec":0.19,"pm_ra_mas_yr":-6.26,"pm_dec_mas_yr":-3.42,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Canis Minor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-57732","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07226+0114","companions":[{"measured":2016,"magnitude":12.56,"components":"AB","discoverer_code":"A  2942","separation_arcsec":1.5,"position_angle_deg":289},{"measured":2015,"magnitude":11.28,"components":"AB,C","discoverer_code":"DAM1371","separation_arcsec":27.8,"position_angle_deg":267}],"mass_solar":2.888,"radius_solar":2.39,"spectral_type":"B9/9.5IV/V","color_index_bv":0.4,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality E)","surface_gravity_log_g":4.005,"surface_temperature_k":11462,"proper_motion_ra_mas_yr":-6.26,"proper_motion_dec_mas_yr":-3.42,"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":82.3387},"designations":[{"catalog":"HD","designation":"HD 57732"},{"catalog":"HIP","designation":"HIP 35765"}],"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."}