{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T07:13:14.049Z","years_from_j2000":26.672,"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-43496","name":"HD 43496","class":"b8ii_blue_white_bright_giant","category":"star","object_type":"B8II blue-white bright giant","mag":7.29,"mag_band":"V","abs_mag":-0.521,"abs_mag_band":"V","distance_ly":1190.3517315882468,"distance_method":"parallax","ra_deg":94.276185,"dec_deg":15.850564,"epoch_ra_deg":94.662523,"epoch_dec_deg":15.84114,"epoch_moved_arcsec":0.304,"pm_ra_mas_yr":-7.06,"pm_dec_mas_yr":-8.93,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Orion","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-43496","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"06171+1551","companions":[{"measured":2015,"magnitude":10.59,"components":"AB","discoverer_code":"H 5  23","separation_arcsec":44.1,"position_angle_deg":230},{"measured":2015,"magnitude":10.25,"components":"AC","discoverer_code":"ARN  39","separation_arcsec":104.1,"position_angle_deg":88}],"mass_solar":3.906,"radius_solar":3.647,"spectral_type":"B8II","color_index_bv":-0.09,"luminosity_solar":140.7343138318349,"radial_velocity_km_s":21,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":3.816,"surface_temperature_k":13154,"proper_motion_ra_mas_yr":-7.06,"proper_motion_dec_mas_yr":-8.93,"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":329.6354},"designations":[{"catalog":"HD","designation":"HD 43496"},{"catalog":"HIP","designation":"HIP 29849"}],"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."}