{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T06:35:55.878Z","years_from_j2000":26.685,"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-116542","name":"HD 116542","class":"ka4hf1mf0_yellow_white_star","category":"star","object_type":"kA4hF1mF0 yellow-white star","mag":7.24,"mag_band":"V","abs_mag":2.026,"abs_mag_band":"V","distance_ly":359.99608037398866,"distance_method":"parallax","ra_deg":201.076605,"dec_deg":1.399722,"epoch_ra_deg":201.419488,"epoch_dec_deg":1.259385,"epoch_moved_arcsec":0.756,"pm_ra_mas_yr":-26.42,"pm_dec_mas_yr":-10.19,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Virgo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-116542","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"13243+0124","companions":[{"measured":2022,"magnitude":8.2,"components":null,"discoverer_code":"STF1742","separation_arcsec":1,"position_angle_deg":0}],"spectral_type":"kA4hF1mF0","color_index_bv":0.241,"luminosity_solar":13.477210138513502,"radial_velocity_km_s":-15.2,"spectral_type_source":"SIMBAD (2008ApJS..176..216A, quality D)","proper_motion_ra_mas_yr":-26.42,"proper_motion_dec_mas_yr":-10.19},"designations":[{"catalog":"HD","designation":"HD 116542"},{"catalog":"HIP","designation":"HIP 65405"}],"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."}