{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T08:31:13.904Z","years_from_j2000":26.669,"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-8703","name":"HD 8703","class":"a0_white_star","category":"star","object_type":"A0 white star","mag":7.21,"mag_band":"V","abs_mag":1.175,"abs_mag_band":"V","distance_ly":525.2115719755382,"distance_method":"parallax","ra_deg":21.49266,"dec_deg":10.406975,"epoch_ra_deg":21.846767,"epoch_dec_deg":10.546778,"epoch_moved_arcsec":1.04,"pm_ra_mas_yr":38.56,"pm_dec_mas_yr":5.81,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pisces","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-8703","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01260+1024","age_years":239757670,"companions":[{"measured":2016,"magnitude":14.2,"components":null,"discoverer_code":"A  2213","separation_arcsec":4.4,"position_angle_deg":127}],"mass_solar":2.269,"radius_solar":1.941,"spectral_type":"A0","color_index_bv":0.051,"luminosity_solar":29.512092266663856,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_gravity_log_g":4.066,"surface_temperature_k":9813,"proper_motion_ra_mas_yr":38.56,"proper_motion_dec_mas_yr":5.81,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":30.5552},"designations":[{"catalog":"HD","designation":"HD 8703"},{"catalog":"HIP","designation":"HIP 6695"}],"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."}