{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T22:00:44.253Z","years_from_j2000":26.668,"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-22326","name":"HD 22326","class":"f7iv_v_yellow_white_subgiant","category":"star","object_type":"F7IV-V yellow-white subgiant","mag":8.88,"mag_band":"V","abs_mag":2.667,"abs_mag_band":"V","distance_ly":570.203539656052,"distance_method":"parallax","ra_deg":54.429300000000005,"dec_deg":48.117322,"epoch_ra_deg":54.908393,"epoch_dec_deg":48.205499,"epoch_moved_arcsec":1.087,"pm_ra_mas_yr":35.77,"pm_dec_mas_yr":-19.58,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Perseus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-22326","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03377+4807","age_years":4480485000,"companions":[{"measured":2024,"magnitude":9.81,"components":"AB","discoverer_code":"HLD   9","separation_arcsec":1.2,"position_angle_deg":55},{"measured":2015,"magnitude":13.42,"components":"AC","discoverer_code":"HLD   9","separation_arcsec":55.5,"position_angle_deg":65}],"mass_solar":1.21,"radius_solar":1.627,"spectral_type":"F7IV-V","uncertainties":{"metallicity_fe_h":[0.192,0.192]},"color_index_bv":0.5,"luminosity_solar":7.467925899308832,"metallicity_fe_h":0.03,"radial_velocity_km_s":14,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":3.913,"surface_temperature_k":6037,"metallicity_fe_h_source":"Median of 3 spectroscopic determinations in 3 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":35.77,"proper_motion_dec_mas_yr":-19.58,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":2.946},"designations":[{"catalog":"HD","designation":"HD 22326"},{"catalog":"HIP","designation":"HIP 16915"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}