{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T21:24:42.503Z","years_from_j2000":26.673,"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-80441","name":"HD 80441","class":"f3vs_f3vs_yellow_white_main_sequence_star","category":"star","object_type":"F3Vs+F3Vs yellow-white main-sequence star","mag":6.12,"mag_band":"V","abs_mag":2.97,"abs_mag_band":"V","distance_ly":139.1451600178948,"distance_method":"parallax","ra_deg":140.24742,"dec_deg":38.188262,"epoch_ra_deg":140.667179,"epoch_dec_deg":38.074288,"epoch_moved_arcsec":1.277,"pm_ra_mas_yr":-43.49,"pm_dec_mas_yr":-20.01,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lynx","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-80441","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"09210+3811","companions":[{"measured":2024,"magnitude":7.08,"components":"AB","discoverer_code":"STF1338","separation_arcsec":1.2,"position_angle_deg":320},{"measured":2017,"magnitude":12.59,"components":"AB,C","discoverer_code":"STF1338","separation_arcsec":143.2,"position_angle_deg":166}],"spectral_type":"F3Vs+F3Vs","color_index_bv":0.38,"luminosity_solar":5.649369748123025,"radial_velocity_km_s":1,"spectral_type_source":"SIMBAD (1955ApJ...121..337S, quality C)","surface_temperature_k":6554,"proper_motion_ra_mas_yr":-43.49,"proper_motion_dec_mas_yr":-20.01,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 80441"},{"catalog":"HIP","designation":"HIP 45858"},{"catalog":"HR","designation":"HR 3701"}],"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."}