{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T15:47:25.645Z","years_from_j2000":26.67,"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-89269","name":"HD 89269","class":"g4v_yellow_main_sequence_star","category":"star","object_type":"G4V yellow main-sequence star","mag":6.66,"mag_band":"V","abs_mag":5.129,"abs_mag_band":"V","distance_ly":66.01013697333627,"distance_method":"parallax","ra_deg":154.71639,"dec_deg":44.048323,"epoch_ra_deg":155.124209,"epoch_dec_deg":43.911699,"epoch_moved_arcsec":8.158,"pm_ra_mas_yr":62.98,"pm_dec_mas_yr":-299.34,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ursa Major","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-89269","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"10189+4403","age_years":5723997000,"companions":[{"measured":2010,"magnitude":9.37,"components":null,"discoverer_code":"ENG  43","separation_arcsec":144.1,"position_angle_deg":95}],"mass_solar":0.944,"radius_solar":0.935,"spectral_type":"G4V","uncertainties":{"metallicity_fe_h":[0.044,0.044]},"color_index_bv":0.653,"luminosity_solar":0.7733925780489972,"metallicity_fe_h":-0.17,"radial_velocity_km_s":-8.3,"spectral_type_source":"SIMBAD (2003AJ....126.2048G, quality C)","surface_gravity_log_g":4.415,"surface_temperature_k":5581,"metallicity_fe_h_source":"Median of 11 spectroscopic determinations in 12 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":62.98,"proper_motion_dec_mas_yr":-299.34,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.7645},"designations":[{"catalog":"Gliese","designation":"GJ 3593"},{"catalog":"HD","designation":"HD 89269"},{"catalog":"HIP","designation":"HIP 50505"}],"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."}