{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T14:23:10.191Z","years_from_j2000":26.67,"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-136567","name":"HD 136567","class":"g8iii_iv_yellow_giant","category":"star","object_type":"G8III/IV yellow giant","mag":8.11,"mag_band":"V","abs_mag":0.029,"abs_mag_band":"V","distance_ly":1347.7534948488362,"distance_method":"parallax","ra_deg":230.454105,"dec_deg":-15.161006,"epoch_ra_deg":230.828925,"epoch_dec_deg":-15.257687,"epoch_moved_arcsec":0.85,"pm_ra_mas_yr":-28.44,"pm_dec_mas_yr":-14.35,"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-136567","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15218-1510","age_years":413950950,"companions":[{"measured":2017,"magnitude":10.51,"components":null,"discoverer_code":"BU 1448","separation_arcsec":33.3,"position_angle_deg":271}],"mass_solar":2.874,"radius_solar":10.277,"spectral_type":"G8III/IV","color_index_bv":1.006,"luminosity_solar":84.80080988896916,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality D)","surface_gravity_log_g":2.801,"surface_temperature_k":5802,"proper_motion_ra_mas_yr":-28.44,"proper_motion_dec_mas_yr":-14.35,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":92.1469},"designations":[{"catalog":"HD","designation":"HD 136567"},{"catalog":"HIP","designation":"HIP 75179"}],"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."}