{"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":"2026-09-01T13:21:57.875Z","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-5015","name":"HD 5015","class":"f9v_yellow_white_main_sequence_star","category":"star","object_type":"F9V yellow-white main-sequence star","mag":4.8,"mag_band":"V","abs_mag":3.436,"abs_mag_band":"V","distance_ly":61.1350775956041,"distance_method":"parallax","ra_deg":13.267665000000001,"dec_deg":61.12397,"epoch_ra_deg":13.669821,"epoch_dec_deg":61.271118,"epoch_moved_arcsec":4.88,"pm_ra_mas_yr":-68.45,"pm_dec_mas_yr":169.72,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cassiopeia","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-5015","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"00531+6107","age_years":5551601400,"companions":[{"measured":2003,"magnitude":12.09,"components":"AD","discoverer_code":"BU  497","separation_arcsec":107.2,"position_angle_deg":145},{"measured":2012,"magnitude":12.82,"components":"AE","discoverer_code":"BU  497","separation_arcsec":123.2,"position_angle_deg":45},{"measured":2015,"magnitude":9.79,"components":"AB","discoverer_code":"BU  497","separation_arcsec":146,"position_angle_deg":170}],"mass_solar":1.178,"radius_solar":1.773,"spectral_type":"F9V","uncertainties":{"metallicity_fe_h":[0.059,0.059]},"color_index_bv":0.54,"luminosity_solar":3.677900704223862,"metallicity_fe_h":0.06,"radial_velocity_km_s":20.8,"spectral_type_source":"SIMBAD (2009ApJS..180..117A, quality C)","surface_gravity_log_g":4.079,"surface_temperature_k":5986,"metallicity_fe_h_source":"Median of 13 spectroscopic determinations in 16 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-68.45,"proper_motion_dec_mas_yr":169.72,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":3.677},"designations":[{"catalog":"Gliese","designation":"Gl 41"},{"catalog":"HD","designation":"HD 5015"},{"catalog":"HIP","designation":"HIP 4151"},{"catalog":"HR","designation":"HR 244"}],"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."}