{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T17:39:50.704Z","years_from_j2000":26.678,"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-116457","name":"HD 116457","class":"f3iv_yellow_white_subgiant","category":"star","object_type":"F3IV yellow-white subgiant","mag":5.32,"mag_band":"V","abs_mag":2.354,"abs_mag_band":"V","distance_ly":127.85427853409657,"distance_method":"parallax","ra_deg":201.30852,"dec_deg":-64.485144,"epoch_ra_deg":201.760917,"epoch_dec_deg":-64.625246,"epoch_moved_arcsec":4.156,"pm_ra_mas_yr":-154.3,"pm_dec_mas_yr":-21.43,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Centaurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-116457","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"13252-6429","age_years":1912912800,"companions":[{"measured":2015,"magnitude":10.9,"components":"AB","discoverer_code":"HJ 4583","separation_arcsec":22,"position_angle_deg":172},{"measured":2016,"magnitude":13.9,"components":"AC","discoverer_code":"SOZ  23","separation_arcsec":22.4,"position_angle_deg":346}],"mass_solar":1.572,"radius_solar":2.307,"spectral_type":"F3IV","color_index_bv":0.411,"luminosity_solar":9.963226419544174,"metallicity_fe_h":-0.07,"radial_velocity_km_s":-2,"spectral_type_source":"SIMBAD (2006A&A...460..695T, quality C)","surface_gravity_log_g":3.858,"surface_temperature_k":6536,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-154.3,"proper_motion_dec_mas_yr":-21.43,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":8.7849},"designations":[{"catalog":"HD","designation":"HD 116457"},{"catalog":"HIP","designation":"HIP 65479"},{"catalog":"HR","designation":"HR 5048"}],"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."}