{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T23:38:40.353Z","years_from_j2000":26.682,"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-113584","name":"HD 113584","class":"a1ma7_f0_white_star","category":"star","object_type":"A1mA7-F0 white star","mag":9.43,"mag_band":"V","abs_mag":2.637,"abs_mag_band":"V","distance_ly":744.6492567469854,"distance_method":"parallax","ra_deg":196.32189000000002,"dec_deg":-44.696047,"epoch_ra_deg":196.70622,"epoch_dec_deg":-44.84015,"epoch_moved_arcsec":0.338,"pm_ra_mas_yr":10.59,"pm_dec_mas_yr":-6.95,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Centaurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-113584","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"13053-4442","companions":[{"measured":1946,"magnitude":11.9,"components":null,"discoverer_code":"RST4972","separation_arcsec":0.7,"position_angle_deg":75}],"spectral_type":"A1mA7-F0","color_index_bv":0.251,"luminosity_solar":7.677149537690279,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality C)","proper_motion_ra_mas_yr":10.59,"proper_motion_dec_mas_yr":-6.95},"designations":[{"catalog":"HD","designation":"HD 113584"},{"catalog":"HIP","designation":"HIP 63863"}],"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."}