{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T11:43:04.326Z","years_from_j2000":26.669,"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-24546","name":"43 Per","class":"f5v_yellow_white_main_sequence_star","category":"star","object_type":"F5V yellow-white main-sequence star","mag":5.28,"mag_band":"V","abs_mag":2.413,"abs_mag_band":"V","distance_ly":122.110338566127,"distance_method":"parallax","ra_deg":59.15205,"dec_deg":50.695381,"epoch_ra_deg":59.653108,"epoch_dec_deg":50.772499,"epoch_moved_arcsec":4.235,"pm_ra_mas_yr":94.13,"pm_dec_mas_yr":-127.9,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Perseus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-24546","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03566+5042","age_years":1881302000,"companions":[{"measured":2014,"magnitude":13.43,"components":"AD","discoverer_code":"S   440","separation_arcsec":67.7,"position_angle_deg":291},{"measured":2021,"magnitude":10.66,"components":"AB","discoverer_code":"S   440","separation_arcsec":75.3,"position_angle_deg":31},{"measured":2012,"magnitude":12.18,"components":"AC","discoverer_code":"S   440","separation_arcsec":85.6,"position_angle_deg":132}],"mass_solar":1.583,"radius_solar":2.377,"spectral_type":"F5V","color_index_bv":0.425,"luminosity_solar":9.436262202767269,"radial_velocity_km_s":27,"spectral_type_source":"SIMBAD (2009ApJS..180..117A, quality C)","surface_gravity_log_g":3.892,"surface_temperature_k":6540,"proper_motion_ra_mas_yr":94.13,"proper_motion_dec_mas_yr":-127.9,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":9.0686},"designations":[{"catalog":"Bayer/Flamsteed","designation":"43 Per"},{"catalog":"HD","designation":"HD 24546"},{"catalog":"HIP","designation":"HIP 18453"},{"catalog":"HR","designation":"HR 1210"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}