{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T18:50:30.274Z","years_from_j2000":26.667,"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-54519","name":"HIP 54519","class":"k8_orange_star","category":"star","object_type":"K8 orange star","mag":11.07,"mag_band":"V","abs_mag":7.015,"abs_mag_band":"V","distance_ly":211.10438932078446,"distance_method":"parallax","ra_deg":167.32125,"dec_deg":19.025989,"epoch_ra_deg":167.676243,"epoch_dec_deg":18.880827,"epoch_moved_arcsec":3.147,"pm_ra_mas_yr":-112.78,"pm_dec_mas_yr":34.77,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Leo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-54519","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"11093+1902","companions":[{"measured":2015,"magnitude":13.51,"components":"AB","discoverer_code":"VVO   8","separation_arcsec":27.2,"position_angle_deg":275}],"mass_solar":0.735,"radius_solar":0.743,"spectral_type":"K8","color_index_bv":1.593,"luminosity_solar":0.13614446824659496,"variable_mag_max":10.977,"variable_mag_min":11.147,"radial_velocity_km_s":0,"surface_gravity_log_g":4.563,"surface_temperature_k":4689,"proper_motion_ra_mas_yr":-112.78,"proper_motion_dec_mas_yr":34.77,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.2412},"designations":[{"catalog":"HIP","designation":"HIP 54519"}],"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."}