{"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":"2026-09-04T21:00:08.761Z","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-113889","name":"HD 113889","class":"ka5ha9mf0_white_star","category":"star","object_type":"kA5hA9mF0 white star","mag":6.43,"mag_band":"V","abs_mag":1.031,"abs_mag_band":"V","distance_ly":392.0148519744414,"distance_method":"parallax","ra_deg":196.20738,"dec_deg":73.024976,"epoch_ra_deg":196.421203,"epoch_dec_deg":72.880905,"epoch_moved_arcsec":0.569,"pm_ra_mas_yr":-19.04,"pm_dec_mas_yr":9.64,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ursa Minor","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-113889","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"13048+7302","companions":[{"measured":2023,"magnitude":8.45,"components":"AB","discoverer_code":"BU  799","separation_arcsec":1.3,"position_angle_deg":266},{"measured":2023,"magnitude":11.07,"components":"AB,C","discoverer_code":"BU  799","separation_arcsec":91.5,"position_angle_deg":17}],"spectral_type":"kA5hA9mF0","color_index_bv":0.218,"luminosity_solar":33.69767985844037,"radial_velocity_km_s":-16,"spectral_type_source":"SIMBAD (1995ApJS...99..135A, quality D)","surface_temperature_k":7691,"proper_motion_ra_mas_yr":-19.04,"proper_motion_dec_mas_yr":9.64,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 113889"},{"catalog":"HIP","designation":"HIP 63822"},{"catalog":"HR","designation":"HR 4950"}],"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."}