{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T14:03:13.378Z","years_from_j2000":26.683,"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":"hip-58789","name":"HIP 58789","class":"f_yellow_white_star","category":"star","object_type":"F yellow-white star","mag":10.02,"mag_band":"V","abs_mag":4.458,"abs_mag_band":"V","distance_ly":422.4824238424733,"distance_method":"parallax","ra_deg":180.868935,"dec_deg":41.404274,"epoch_ra_deg":181.212601,"epoch_dec_deg":41.254542,"epoch_moved_arcsec":0.783,"pm_ra_mas_yr":-23.13,"pm_dec_mas_yr":-18.04,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Ursa Major","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-58789","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"12035+4124","companions":[{"measured":2015,"magnitude":14.7,"components":"AB","discoverer_code":"BU 1323","separation_arcsec":2.1,"position_angle_deg":322},{"measured":2015,"magnitude":11.1,"components":"AC","discoverer_code":"STF1594","separation_arcsec":11,"position_angle_deg":142},{"measured":2015,"magnitude":14.4,"components":"AD","discoverer_code":"STF1594","separation_arcsec":27.2,"position_angle_deg":71}],"spectral_type":"F","color_index_bv":0.594,"luminosity_solar":1.4348285182325882,"variable_mag_max":9.955,"variable_mag_min":10.155,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1963AJ.....68..194U, quality E)","proper_motion_ra_mas_yr":-23.13,"proper_motion_dec_mas_yr":-18.04},"designations":[{"catalog":"HIP","designation":"HIP 58789"}],"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."}