{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T21:23:54.600Z","years_from_j2000":26.673,"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-8934","name":"HD 8934","class":"f7v_yellow_white_main_sequence_star","category":"star","object_type":"F7V yellow-white main-sequence star","mag":8.09,"mag_band":"V","abs_mag":4.187,"abs_mag_band":"V","distance_ly":196.83537395205465,"distance_method":"parallax","ra_deg":21.773609999999998,"dec_deg":-51.965774,"epoch_ra_deg":22.052788,"epoch_dec_deg":-51.825665,"epoch_moved_arcsec":8.12,"pm_ra_mas_yr":294.95,"pm_dec_mas_yr":75.32,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Phoenix","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-8934","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01271-5158","age_years":6052962300,"companions":[{"measured":2015,"magnitude":13.78,"components":"AB","discoverer_code":"NSN 211","separation_arcsec":3,"position_angle_deg":112},{"measured":2015,"magnitude":11,"components":"AC","discoverer_code":"SHY 404","separation_arcsec":388.8,"position_angle_deg":137}],"mass_solar":1.046,"radius_solar":1.18,"spectral_type":"F7V","color_index_bv":0.544,"luminosity_solar":1.8416199035246699,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality C)","surface_gravity_log_g":4.211,"surface_temperature_k":5935,"proper_motion_ra_mas_yr":294.95,"proper_motion_dec_mas_yr":75.32,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":1.548},"designations":[{"catalog":"HD","designation":"HD 8934"},{"catalog":"HIP","designation":"HIP 6772"}],"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."}