{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T09:40:50.584Z","years_from_j2000":26.675,"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-196850","name":"HD 196850","class":"g1v_yellow_main_sequence_star","category":"star","object_type":"G1V yellow main-sequence star","mag":6.76,"mag_band":"V","abs_mag":4.59,"abs_mag_band":"V","distance_ly":88.58146293684577,"distance_method":"parallax","ra_deg":309.66731999999996,"dec_deg":38.635093,"epoch_ra_deg":309.920177,"epoch_dec_deg":38.727593,"epoch_moved_arcsec":7.435,"pm_ra_mas_yr":200.85,"pm_dec_mas_yr":-193.24,"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-196850","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20387+3838","age_years":10807791000,"companions":[{"measured":2015,"magnitude":13.7,"components":"AC","discoverer_code":"STF2708","separation_arcsec":40.6,"position_angle_deg":336},{"measured":2018,"magnitude":8.67,"components":"AB","discoverer_code":"STF2708","separation_arcsec":57.9,"position_angle_deg":323},{"measured":2015,"magnitude":11.26,"components":"AD","discoverer_code":"STF2708","separation_arcsec":115.6,"position_angle_deg":231}],"mass_solar":0.95,"radius_solar":1.155,"spectral_type":"G1V","uncertainties":{"metallicity_fe_h":[0.03,0.03]},"color_index_bv":0.61,"luminosity_solar":1.2705741052085415,"metallicity_fe_h":-0.11,"radial_velocity_km_s":-21.4,"spectral_type_source":"SIMBAD (2003AJ....126.2048G, quality C)","surface_gravity_log_g":4.32,"surface_temperature_k":5697,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":200.85,"proper_motion_dec_mas_yr":-193.24,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":1.2615},"designations":[{"catalog":"Gliese","designation":"Gl 794.3"},{"catalog":"HD","designation":"HD 196850"},{"catalog":"HIP","designation":"HIP 101875"}],"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."}