{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T20:29:10.916Z","years_from_j2000":26.684,"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":"zubenelhakrabi","name":"Zubenelhakrabi","class":"g8_5iii_yellow_giant","category":"star","object_type":"G8.5III yellow giant","mag":3.91,"mag_band":"V","abs_mag":0.414,"abs_mag_band":"V","distance_ly":163.1597279528009,"distance_method":"parallax","ra_deg":233.881575,"dec_deg":-14.789537,"epoch_ra_deg":234.258071,"epoch_dec_deg":-14.879129,"epoch_moved_arcsec":1.762,"pm_ra_mas_yr":65.67,"pm_dec_mas_yr":6.93,"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/zubenelhakrabi","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15355-1447","companions":[{"measured":1940,"magnitude":4.2,"components":"Aa,Ab","discoverer_code":"WRH  20","separation_arcsec":0.1,"position_angle_deg":191},{"measured":2015,"magnitude":11.2,"components":"AB","discoverer_code":"GOL   1","separation_arcsec":41.9,"position_angle_deg":158}],"spectral_type":"G8.5III","uncertainties":{"metallicity_fe_h":[0.05,0.05]},"color_index_bv":1.007,"luminosity_solar":59.48397740692212,"metallicity_fe_h":-0.355,"radial_velocity_km_s":-28.2,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality C)","surface_gravity_log_g":2.58,"surface_temperature_k":4762,"metallicity_fe_h_source":"Median of 6 spectroscopic determinations in 9 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":65.67,"proper_motion_dec_mas_yr":6.93,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"38 Gamma Lib"},{"catalog":"Common name","designation":"Zubenelhakrabi"},{"catalog":"Exoplanet host","designation":"γ Lib"},{"catalog":"Gliese","designation":"GJ 3912"},{"catalog":"HD","designation":"HD 138905"},{"catalog":"HIP","designation":"HIP 76333"},{"catalog":"HR","designation":"HR 5787"}],"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."}