{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T15:04:12.029Z","years_from_j2000":26.672,"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-68017","name":"HD 68017","class":"g3v_yellow_main_sequence_star","category":"star","object_type":"G3V yellow main-sequence star","mag":6.78,"mag_band":"V","abs_mag":5.089,"abs_mag_band":"V","distance_ly":71.05805923125831,"distance_method":"parallax","ra_deg":122.91123,"dec_deg":32.45713,"epoch_ra_deg":123.331533,"epoch_dec_deg":32.372595,"epoch_moved_arcsec":21.134,"pm_ra_mas_yr":-460.69,"pm_dec_mas_yr":-644.64,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cancer","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-68017","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08116+3227","companions":[{"measured":2017,"magnitude":13.7,"components":"AD","discoverer_code":"FYM 620","separation_arcsec":44.2,"position_angle_deg":204},{"measured":2016,"magnitude":11.7,"components":"AB","discoverer_code":"STT 564","separation_arcsec":110.5,"position_angle_deg":9},{"measured":2016,"magnitude":10.78,"components":"AC","discoverer_code":"STT 564","separation_arcsec":295.5,"position_angle_deg":66}],"spectral_type":"G3V","uncertainties":{"metallicity_fe_h":[0.05,0.05]},"color_index_bv":0.679,"luminosity_solar":0.8024167763085841,"metallicity_fe_h":-0.44,"radial_velocity_km_s":30.6,"spectral_type_source":"SIMBAD (2003AJ....126.2048G, quality C)","surface_gravity_log_g":4.45,"surface_temperature_k":5546,"metallicity_fe_h_source":"Median of 9 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":-460.69,"proper_motion_dec_mas_yr":-644.64,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Gliese","designation":"GJ 9256"},{"catalog":"HD","designation":"HD 68017"},{"catalog":"HIP","designation":"HIP 40118"}],"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."}