{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-02T23:26:47.352Z","years_from_j2000":26.671,"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-22743","name":"HD 22743","class":"f8_yellow_white_star","category":"star","object_type":"F8 yellow-white star","mag":7.93,"mag_band":"V","abs_mag":4.417,"abs_mag_band":"V","distance_ly":164.47609509326568,"distance_method":"parallax","ra_deg":55.316415,"dec_deg":45.89584,"epoch_ra_deg":55.785944,"epoch_dec_deg":45.982327,"epoch_moved_arcsec":1.332,"pm_ra_mas_yr":-49.74,"pm_dec_mas_yr":4.39,"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-22743","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03413+4554","companions":[{"measured":2012,"magnitude":9.9,"components":"CF","discoverer_code":"BU 1181","separation_arcsec":0.1,"position_angle_deg":88},{"measured":2016,"magnitude":14,"components":"CG","discoverer_code":"RAO  48","separation_arcsec":4.8,"position_angle_deg":269}],"spectral_type":"F8","color_index_bv":0.665,"luminosity_solar":1.490047111787099,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","proper_motion_ra_mas_yr":-49.74,"proper_motion_dec_mas_yr":4.39},"designations":[{"catalog":"HD","designation":"HD 22743"},{"catalog":"HIP","designation":"HIP 17217"}],"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."}