{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T02:31:47.764Z","years_from_j2000":26.666,"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-219127","name":"HD 219127","class":"a3_white_star","category":"star","object_type":"A3 white star","mag":7.6,"mag_band":"V","abs_mag":0.762,"abs_mag_band":"V","distance_ly":760.2711687704843,"distance_method":"parallax","ra_deg":348.276495,"dec_deg":40.002816,"epoch_ra_deg":348.59408,"epoch_dec_deg":40.14879,"epoch_moved_arcsec":2.009,"pm_ra_mas_yr":75.33,"pm_dec_mas_yr":2.04,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Andromeda","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-219127","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"23131+4000","age_years":914381150,"companions":[{"measured":2021,"magnitude":9.59,"components":"AB","discoverer_code":"STF2992","separation_arcsec":14.2,"position_angle_deg":285},{"measured":2015,"magnitude":14.22,"components":"AC","discoverer_code":"STF2992","separation_arcsec":53.3,"position_angle_deg":335}],"mass_solar":2.063,"radius_solar":3.211,"spectral_type":"A3","color_index_bv":0.28,"luminosity_solar":43.171784447092264,"variable_mag_max":7.565,"variable_mag_min":7.675,"radial_velocity_km_s":-8,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_gravity_log_g":3.658,"surface_temperature_k":7461,"proper_motion_ra_mas_yr":75.33,"proper_motion_dec_mas_yr":2.04,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":27.9697},"designations":[{"catalog":"HD","designation":"HD 219127"},{"catalog":"HIP","designation":"HIP 114612"}],"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."}