{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T13:45:42.375Z","years_from_j2000":26.678,"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-144087","name":"HD 144087","class":"k1_v_orange_dwarf","category":"star","object_type":"K1(V) orange dwarf","mag":7.44,"mag_band":"V","abs_mag":5.428,"abs_mag_band":"V","distance_ly":82.3835132910945,"distance_method":"parallax","ra_deg":241.108005,"dec_deg":-11.44938,"epoch_ra_deg":241.478067,"epoch_dec_deg":-11.52337,"epoch_moved_arcsec":1.928,"pm_ra_mas_yr":-69.17,"pm_dec_mas_yr":-20.93,"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/hd-144087","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"16044-1127","age_years":10261675000,"companions":[{"measured":2020,"magnitude":7.99,"components":"AB","discoverer_code":"STF1999","separation_arcsec":11.9,"position_angle_deg":98},{"measured":2015,"magnitude":11.41,"components":"AC","discoverer_code":"STF1999","separation_arcsec":84.5,"position_angle_deg":85},{"measured":2015,"magnitude":4.1,"components":"AD","discoverer_code":"STF1999","separation_arcsec":279.7,"position_angle_deg":349}],"mass_solar":0.887,"radius_solar":0.941,"spectral_type":"K1(V)","color_index_bv":0.75,"luminosity_solar":0.587218865971303,"variable_mag_max":7.39,"variable_mag_min":7.72,"radial_velocity_km_s":-31.5,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality D)","surface_gravity_log_g":4.439,"surface_temperature_k":5467,"proper_motion_ra_mas_yr":-69.17,"proper_motion_dec_mas_yr":-20.93,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.7068},"designations":[{"catalog":"Gliese","designation":"GJ 9541A"},{"catalog":"HD","designation":"HD 144087"},{"catalog":"HIP","designation":"HIP 78738"}],"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."}