{"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":"2026-09-03T14:11:52.633Z","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-4732","name":"HD 4732","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":5.9,"mag_band":"V","abs_mag":2.086,"abs_mag_band":"V","distance_ly":188.8572627967254,"distance_method":"parallax","ra_deg":12.308100000000001,"dec_deg":-24.136672,"epoch_ra_deg":12.639364,"epoch_dec_deg":-23.990655,"epoch_moved_arcsec":2.607,"pm_ra_mas_yr":77.47,"pm_dec_mas_yr":-59.62,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cetus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-4732","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"00492-2408","age_years":3330543800,"companions":[{"measured":2016,"magnitude":13.8,"components":null,"discoverer_code":"B    13","separation_arcsec":8.8,"position_angle_deg":165}],"mass_solar":1.422,"radius_solar":5.191,"spectral_type":"K0III","uncertainties":{"metallicity_fe_h":[0.074,0.074]},"color_index_bv":0.944,"luminosity_solar":12.752637064597302,"metallicity_fe_h":0.04,"radial_velocity_km_s":23,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality C)","surface_gravity_log_g":2.948,"surface_temperature_k":4914,"metallicity_fe_h_source":"Median of 3 spectroscopic determinations in 3 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":77.47,"proper_motion_dec_mas_yr":-59.62,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":13.5231},"designations":[{"catalog":"HD","designation":"HD 4732"},{"catalog":"HIP","designation":"HIP 3834"},{"catalog":"HR","designation":"HR 228"}],"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."}