{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T21:00:23.716Z","years_from_j2000":26.676,"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-143699","name":"HD 143699","class":"b5_7iii_iv_blue_white_giant","category":"star","object_type":"B5/7III/IV blue-white giant","mag":4.9,"mag_band":"V","abs_mag":-0.542,"abs_mag_band":"V","distance_ly":399.7013793280919,"distance_method":"parallax","ra_deg":240.8508,"dec_deg":-38.602541,"epoch_ra_deg":241.298485,"epoch_dec_deg":-38.677074,"epoch_moved_arcsec":0.896,"pm_ra_mas_yr":-17.68,"pm_dec_mas_yr":-28.54,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lupus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-143699","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"mass_solar":3.99,"radius_solar":4.035,"spectral_type":"B5/7III/IV","color_index_bv":-0.146,"luminosity_solar":143.4828518232589,"radial_velocity_km_s":-2,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality E)","surface_gravity_log_g":3.865,"surface_temperature_k":13375,"proper_motion_ra_mas_yr":-17.68,"proper_motion_dec_mas_yr":-28.54,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":356.459},"designations":[{"catalog":"HD","designation":"HD 143699"},{"catalog":"HIP","designation":"HIP 78655"},{"catalog":"HR","designation":"HR 5967"}],"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."}