{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-05T00:56:21.370Z","years_from_j2000":26.676,"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-27934","name":"65 κ¹ Tau","class":"a7iv_v_white_subgiant","category":"star","object_type":"A7IV-V white subgiant","mag":4.21,"mag_band":"V","abs_mag":0.841,"abs_mag_band":"V","distance_ly":153.9200439284633,"distance_method":"parallax","ra_deg":66.34233,"dec_deg":22.293874,"epoch_ra_deg":66.743252,"epoch_dec_deg":22.355165,"epoch_moved_arcsec":3.051,"pm_ra_mas_yr":105.49,"pm_dec_mas_yr":-44.14,"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-27934","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04254+2218","companions":[{"measured":2014,"magnitude":13.08,"components":"AE","discoverer_code":"STF 541","separation_arcsec":146.5,"position_angle_deg":269},{"measured":2013,"magnitude":10.59,"components":"A,CD","discoverer_code":"STF 541","separation_arcsec":177.6,"position_angle_deg":176},{"measured":2016,"magnitude":5.29,"components":"AB","discoverer_code":"STF 541","separation_arcsec":339.4,"position_angle_deg":174}],"spectral_type":"A7IV-V","uncertainties":{"metallicity_fe_h":[0.35,0.35]},"color_index_bv":0.136,"luminosity_solar":40.14209182043211,"metallicity_fe_h":0.05,"radial_velocity_km_s":40,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":3.83,"surface_temperature_k":8247,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":105.49,"proper_motion_dec_mas_yr":-44.14,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"65 Kappa1 Tau"},{"catalog":"HD","designation":"HD 27934"},{"catalog":"HIP","designation":"HIP 20635"},{"catalog":"HR","designation":"HR 1387"}],"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."}