{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-09-01T00:14:13.255Z","years_from_j2000":26.665,"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":"iklil","name":"Iklil","class":"b2iv_v_blue_white_subgiant","category":"star","object_type":"B2IV-V blue-white subgiant","mag":3.87,"mag_band":"V","abs_mag":-1.933,"abs_mag_band":"V","distance_ly":472.00633439136135,"distance_method":"parallax","ra_deg":239.22115499999998,"dec_deg":-29.214073,"epoch_ra_deg":239.636415,"epoch_dec_deg":-29.292272,"epoch_moved_arcsec":0.782,"pm_ra_mas_yr":-15.2,"pm_dec_mas_yr":-25.1,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Scorpius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/iklil","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"15569-2913","companions":[{"measured":2010,"magnitude":14.65,"components":"AC","discoverer_code":"LAF  86","separation_arcsec":2.7,"position_angle_deg":1},{"measured":2016,"magnitude":12.8,"components":"AB","discoverer_code":"SEE 251","separation_arcsec":38.1,"position_angle_deg":93}],"spectral_type":"B2IV-V","color_index_bv":-0.199,"luminosity_solar":516.6542425669502,"radial_velocity_km_s":3.3,"spectral_type_source":"SIMBAD (quality C)","surface_temperature_k":21150,"proper_motion_ra_mas_yr":-15.2,"proper_motion_dec_mas_yr":-25.1,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"5 Rho Sco"},{"catalog":"Common name","designation":"Iklil"},{"catalog":"HD","designation":"HD 142669"},{"catalog":"HIP","designation":"HIP 78104"},{"catalog":"HR","designation":"HR 5928"}],"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."}