{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T11:26:27.415Z","years_from_j2000":26.667,"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-40460","name":"HD 40460","class":"k1iii_orange_giant","category":"star","object_type":"K1III orange giant","mag":6.61,"mag_band":"V","abs_mag":0.804,"abs_mag_band":"V","distance_ly":472.69028431543336,"distance_method":"parallax","ra_deg":90.02517,"dec_deg":27.272188,"epoch_ra_deg":90.446112,"epoch_dec_deg":27.273332,"epoch_moved_arcsec":2.031,"pm_ra_mas_yr":-11.66,"pm_dec_mas_yr":-75.25,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-40460","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"06001+2716","age_years":557368160,"companions":[{"measured":1989,"magnitude":8.3,"components":"AB","discoverer_code":"OCC 242","separation_arcsec":0.1,"position_angle_deg":-1},{"measured":1989,"magnitude":8.3,"components":"AC","discoverer_code":"OCC 242","separation_arcsec":0.1,"position_angle_deg":-1},{"measured":1989,"magnitude":10,"components":"AD","discoverer_code":"OCC 242","separation_arcsec":0.2,"position_angle_deg":-1}],"mass_solar":2.602,"radius_solar":10.403,"spectral_type":"K1III","uncertainties":{"metallicity_fe_h":[0.138,0.138]},"color_index_bv":1.022,"luminosity_solar":41.53364054890737,"metallicity_fe_h":-0.25,"radial_velocity_km_s":98.8,"spectral_type_source":"SIMBAD (2009A&A...508.1313F, quality C)","surface_gravity_log_g":2.497,"surface_temperature_k":4809,"metallicity_fe_h_source":"Median of 5 spectroscopic determinations in 5 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-11.66,"proper_motion_dec_mas_yr":-75.25,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":52.9085},"designations":[{"catalog":"HD","designation":"HD 40460"},{"catalog":"HIP","designation":"HIP 28417"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}