{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T14:57:25.251Z","years_from_j2000":26.681,"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-133352","name":"HD 133352","class":"g8v_yellow_main_sequence_star","category":"star","object_type":"G8V yellow main-sequence star","mag":7.72,"mag_band":"V","abs_mag":5.126,"abs_mag_band":"V","distance_ly":107.71346989733223,"distance_method":"parallax","ra_deg":226.02893999999998,"dec_deg":-6.887361,"epoch_ra_deg":226.384514,"epoch_dec_deg":-6.992603,"epoch_moved_arcsec":5.677,"pm_ra_mas_yr":-212.49,"pm_dec_mas_yr":-10.78,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Libra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-133352","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15041-0653","companions":[{"measured":2022,"magnitude":11.34,"components":"AB","discoverer_code":"HO  391","separation_arcsec":0.9,"position_angle_deg":34},{"measured":2020,"magnitude":12.3,"components":"AC","discoverer_code":"HO  391","separation_arcsec":24.7,"position_angle_deg":327}],"mass_solar":0.869,"radius_solar":1.011,"spectral_type":"G8V","color_index_bv":0.752,"luminosity_solar":0.7755324957585902,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2003AJ....126.2048G, quality C)","surface_gravity_log_g":4.371,"surface_temperature_k":5474,"proper_motion_ra_mas_yr":-212.49,"proper_motion_dec_mas_yr":-10.78,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.8059},"designations":[{"catalog":"HD","designation":"HD 133352"},{"catalog":"HIP","designation":"HIP 73717"}],"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."}