{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-02T02:39:23.644Z","years_from_j2000":26.668,"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-73752","name":"HD 73752","class":"g3v_k0v_yellow_main_sequence_star","category":"star","object_type":"G3V+K0V yellow main-sequence star","mag":5.05,"mag_band":"V","abs_mag":3.611,"abs_mag_band":"V","distance_ly":63.26977108776018,"distance_method":"parallax","ra_deg":129.78297,"dec_deg":-22.661875,"epoch_ra_deg":130.076235,"epoch_dec_deg":-22.752896,"epoch_moved_arcsec":13.382,"pm_ra_mas_yr":-268.26,"pm_dec_mas_yr":424.08,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pyxis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-73752","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08391-2240","companions":[{"measured":2025,"magnitude":6.81,"components":"AB","discoverer_code":"BU  208","separation_arcsec":0.3,"position_angle_deg":73},{"measured":2015,"magnitude":11.35,"components":"AC","discoverer_code":"BU  208","separation_arcsec":121,"position_angle_deg":184}],"spectral_type":"G3V+K0V","uncertainties":{"metallicity_fe_h":[0.104,0.104]},"color_index_bv":0.72,"luminosity_solar":3.1304011900962374,"metallicity_fe_h":0.39,"radial_velocity_km_s":47.7,"spectral_type_source":"SIMBAD (1976AJ.....81..245E, quality C)","surface_gravity_log_g":4.35,"surface_temperature_k":5768,"metallicity_fe_h_source":"Median of 3 spectroscopic determinations in 4 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-268.26,"proper_motion_dec_mas_yr":424.08,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Gliese","designation":"Gl 314A"},{"catalog":"HD","designation":"HD 73752"},{"catalog":"HIP","designation":"HIP 42430"},{"catalog":"HR","designation":"HR 3430"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}