{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T21:02:58.241Z","years_from_j2000":26.673,"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-26015","name":"HD 26015","class":"f3v_yellow_white_main_sequence_star","category":"star","object_type":"F3V yellow-white main-sequence star","mag":6.02,"mag_band":"V","abs_mag":2.821,"abs_mag_band":"V","distance_ly":142.30202759781517,"distance_method":"parallax","ra_deg":61.92492,"dec_deg":15.162788,"epoch_ra_deg":62.305569,"epoch_dec_deg":15.234565,"epoch_moved_arcsec":3.443,"pm_ra_mas_yr":127.06,"pm_dec_mas_yr":-22.75,"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-26015","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04077+1510","age_years":1842522100,"companions":[{"measured":1979,"magnitude":7.8,"components":"Aa,Ab","discoverer_code":"OCC9088","separation_arcsec":1.6,"position_angle_deg":-1},{"measured":2024,"magnitude":8.77,"components":"AB","discoverer_code":"STF 495","separation_arcsec":3.5,"position_angle_deg":222}],"mass_solar":1.445,"radius_solar":1.755,"spectral_type":"F3V","uncertainties":{"metallicity_fe_h":[0.131,0.131]},"color_index_bv":0.397,"luminosity_solar":6.480372941922909,"metallicity_fe_h":0.11,"radial_velocity_km_s":36,"spectral_type_source":"SIMBAD (2010A&A...523A..71G, quality C)","surface_gravity_log_g":4.047,"surface_temperature_k":6738,"metallicity_fe_h_source":"Median of 5 spectroscopic determinations in 6 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":127.06,"proper_motion_dec_mas_yr":-22.75,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":5.7396},"designations":[{"catalog":"HD","designation":"HD 26015"},{"catalog":"HIP","designation":"HIP 19261"},{"catalog":"HR","designation":"HR 1279"}],"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."}