{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.664","julian_year":2026.664,"time":"2026-08-31T12:02:59.950Z","years_from_j2000":26.664,"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":"matza","name":"Matza","class":"a2v_white_main_sequence_star","category":"star","object_type":"A2V white main-sequence star","mag":7.01,"mag_band":"V","abs_mag":2.055,"abs_mag_band":"V","distance_ly":319.44799333986543,"distance_method":"parallax","ra_deg":201.15045,"dec_deg":-51.504458,"epoch_ra_deg":201.559887,"epoch_dec_deg":-51.64464,"epoch_moved_arcsec":1.043,"pm_ra_mas_yr":-34.05,"pm_dec_mas_yr":-19.27,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Centaurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/matza","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"13246-5130","companions":[{"measured":1933,"magnitude":8,"components":"AB","discoverer_code":"I  1231","separation_arcsec":0.2,"position_angle_deg":176}],"wikidata_id":"Q66483747","spectral_type":"A2V","color_index_bv":0.093,"luminosity_solar":13.121998990192028,"wikipedia_article":"HIP 65426","radial_velocity_km_s":0,"proper_motion_ra_mas_yr":-34.05,"proper_motion_dec_mas_yr":-19.27},"designations":[{"catalog":"Common name","designation":"Matza"},{"catalog":"HD","designation":"HD 116434"},{"catalog":"HIP","designation":"HIP 65426"}],"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."}