{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T22:54:02.441Z","years_from_j2000":26.682,"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-134439","name":"HD 134439","class":"sd_k1fe_1_orange_subdwarf","category":"star","object_type":"sd:K1Fe-1 orange subdwarf","mag":9.07,"mag_band":"V","abs_mag":6.769,"abs_mag_band":"V","distance_ly":94.12873060905216,"distance_method":"parallax","ra_deg":227.554635,"dec_deg":-16.379405,"epoch_ra_deg":227.923387,"epoch_dec_deg":-16.507956,"epoch_moved_arcsec":98.216,"pm_ra_mas_yr":-998.86,"pm_dec_mas_yr":-3542.91,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Libra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-134439","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15103-1616","companions":[{"measured":2016,"magnitude":9.55,"components":"AC","discoverer_code":"BUP 161","separation_arcsec":300.6,"position_angle_deg":180},{"measured":2016,"magnitude":12.49,"components":"AD","discoverer_code":"BUP 161","separation_arcsec":360.2,"position_angle_deg":18},{"measured":2016,"magnitude":10.04,"components":"AB","discoverer_code":"LV   20","separation_arcsec":506.8,"position_angle_deg":11}],"radius_solar":0.604,"spectral_type":"sd:K1Fe-1","uncertainties":{"metallicity_fe_h":[0.171,0.171]},"color_index_bv":0.77,"luminosity_solar":0.17076544728138734,"metallicity_fe_h":-1.47,"radial_velocity_km_s":294.3,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality C)","surface_gravity_log_g":4.651,"surface_temperature_k":5023,"metallicity_fe_h_source":"Median of 15 spectroscopic determinations in 23 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-998.86,"proper_motion_dec_mas_yr":-3542.91,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.2076},"designations":[{"catalog":"Gliese","designation":"Gl 579.2A"},{"catalog":"HD","designation":"HD 134439"},{"catalog":"HIP","designation":"HIP 74235"}],"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."}