{"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":"2026-09-01T14:16:59.396Z","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-286955","name":"HD 286955","class":"k3_orange_star","category":"star","object_type":"K3 orange star","mag":9.19,"mag_band":"V","abs_mag":6.762,"abs_mag_band":"V","distance_ly":99.77254056906267,"distance_method":"parallax","ra_deg":69.92754000000001,"dec_deg":9.872073,"epoch_ra_deg":70.295822,"epoch_dec_deg":9.922327,"epoch_moved_arcsec":9.969,"pm_ra_mas_yr":-11.41,"pm_dec_mas_yr":-373.65,"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-286955","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04397+0952","companions":[{"measured":2024,"magnitude":12.77,"components":"Aa,Ab","discoverer_code":"HDS 601","separation_arcsec":0.7,"position_angle_deg":316},{"measured":2015,"magnitude":14.19,"components":"AB","discoverer_code":"GIC  51","separation_arcsec":33.9,"position_angle_deg":164}],"spectral_type":"K3","uncertainties":{"metallicity_fe_h":[0.04,0.04]},"color_index_bv":1.018,"luminosity_solar":0.17186996953977374,"metallicity_fe_h":-0.37,"radial_velocity_km_s":-21.3,"spectral_type_source":"SIMBAD (1985ApJS...59..197B, quality D)","surface_gravity_log_g":4.47,"surface_temperature_k":4850,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-11.41,"proper_motion_dec_mas_yr":-373.65,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Gliese","designation":"Gl 173.1A"},{"catalog":"HD","designation":"HD 286955"},{"catalog":"HIP","designation":"HIP 21710"}],"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."}