{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T10:10:47.133Z","years_from_j2000":26.68,"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-222474","name":"HD 222474","class":"k3_5v_orange_dwarf","category":"star","object_type":"K3.5V orange dwarf","mag":8.27,"mag_band":"V","abs_mag":6.193,"abs_mag_band":"V","distance_ly":84.87012951480696,"distance_method":"parallax","ra_deg":355.21432500000003,"dec_deg":20.365879,"epoch_ra_deg":355.554954,"epoch_dec_deg":20.51521,"epoch_moved_arcsec":6.16,"pm_ra_mas_yr":222.98,"pm_dec_mas_yr":59.83,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pegasus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-222474","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"23409+2022","age_years":9067327000,"companions":[{"measured":2021,"magnitude":10.81,"components":"AB","discoverer_code":"HO  303","separation_arcsec":1,"position_angle_deg":187},{"measured":2001,"magnitude":13.3,"components":"AC","discoverer_code":"HO  303","separation_arcsec":128.1,"position_angle_deg":351}],"mass_solar":0.811,"radius_solar":1.071,"spectral_type":"K3.5V","color_index_bv":1.113,"luminosity_solar":0.2902685610499053,"metallicity_fe_h":0.57,"radial_velocity_km_s":-18.6,"spectral_type_source":"SIMBAD (2003AJ....126.2048G, quality C)","surface_gravity_log_g":4.195,"surface_temperature_k":4393,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":222.98,"proper_motion_dec_mas_yr":59.83,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.3676},"designations":[{"catalog":"Gliese","designation":"Gl 904.1A"},{"catalog":"HD","designation":"HD 222474"},{"catalog":"HIP","designation":"HIP 116838"}],"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."}