{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T08:33:36.647Z","years_from_j2000":26.683,"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-192439","name":"HD 192439","class":"k2_5iii_orange_giant","category":"star","object_type":"K2.5III orange giant","mag":6.01,"mag_band":"V","abs_mag":0.88,"abs_mag_band":"V","distance_ly":346.23815204914104,"distance_method":"parallax","ra_deg":303.13218,"dec_deg":51.463565,"epoch_ra_deg":303.317343,"epoch_dec_deg":51.543484,"epoch_moved_arcsec":0.572,"pm_ra_mas_yr":-14.99,"pm_dec_mas_yr":-15.31,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-192439","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20125+5128","age_years":4841140300,"companions":[{"measured":2016,"magnitude":10.55,"components":"AB","discoverer_code":"AC   17","separation_arcsec":4.4,"position_angle_deg":82},{"measured":2015,"magnitude":12.8,"components":"AD","discoverer_code":"AC   17","separation_arcsec":75.1,"position_angle_deg":80},{"measured":2015,"magnitude":12.63,"components":"AC","discoverer_code":"AC   17","separation_arcsec":84.8,"position_angle_deg":9},{"measured":2015,"magnitude":10.78,"components":"AE","discoverer_code":"AC   17","separation_arcsec":130.4,"position_angle_deg":148}],"mass_solar":1.291,"radius_solar":11.667,"spectral_type":"K2.5III","color_index_bv":1.139,"luminosity_solar":38.72576449216173,"radial_velocity_km_s":13,"spectral_type_source":"SIMBAD (1985ApJS...59...95A, quality C)","surface_gravity_log_g":2.219,"surface_temperature_k":4541,"proper_motion_ra_mas_yr":-14.99,"proper_motion_dec_mas_yr":-15.31,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":51.8661},"designations":[{"catalog":"HD","designation":"HD 192439"},{"catalog":"HIP","designation":"HIP 99579"},{"catalog":"HR","designation":"HR 7726"}],"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."}