{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T04:52:19.914Z","years_from_j2000":26.666,"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-352","name":"HIP 352","class":"k0_orange_star","category":"star","object_type":"K0 orange star","mag":10.42,"mag_band":"V","abs_mag":5.74,"abs_mag_band":"V","distance_ly":281.41196272691656,"distance_method":"parallax","ra_deg":1.11117,"dec_deg":58.068692,"epoch_ra_deg":1.462953,"epoch_dec_deg":58.21789,"epoch_moved_arcsec":11.693,"pm_ra_mas_yr":436.94,"pm_dec_mas_yr":-37.12,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cassiopeia","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-352","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"00044+5804","companions":[{"measured":2016,"magnitude":17.4,"components":"AC","discoverer_code":"OSO   1","separation_arcsec":9.1,"position_angle_deg":357},{"measured":2016,"magnitude":17.1,"components":"AE","discoverer_code":"OSO   1","separation_arcsec":12,"position_angle_deg":128},{"measured":2016,"magnitude":18.2,"components":"AB","discoverer_code":"OSO   1","separation_arcsec":13.7,"position_angle_deg":216},{"measured":2016,"magnitude":16.2,"components":"AF","discoverer_code":"OSO   1","separation_arcsec":17.5,"position_angle_deg":40},{"measured":2016,"magnitude":13.13,"components":"AD","discoverer_code":"OSO   1","separation_arcsec":27.2,"position_angle_deg":309}],"radius_solar":0.727,"spectral_type":"K0","color_index_bv":0.8,"luminosity_solar":0.44055486350655304,"variable_mag_max":10.365,"variable_mag_min":10.505,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1985ApJS...59..197B, quality D)","surface_gravity_log_g":4.548,"surface_temperature_k":5066,"proper_motion_ra_mas_yr":436.94,"proper_motion_dec_mas_yr":-37.12,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.3128},"designations":[{"catalog":"HIP","designation":"HIP 352"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}