{"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":"2026-09-01T05:24:23.005Z","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":"hd-52155","name":"HD 52155","class":"a3_white_star","category":"star","object_type":"A3 white star","mag":7.39,"mag_band":"V","abs_mag":0.153,"abs_mag_band":"V","distance_ly":913.6031527499244,"distance_method":"parallax","ra_deg":105.154635,"dec_deg":12.723395,"epoch_ra_deg":105.531205,"epoch_dec_deg":12.686086,"epoch_moved_arcsec":0.143,"pm_ra_mas_yr":-5.37,"pm_dec_mas_yr":0.18,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Gemini","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-52155","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07006+1243","companions":[{"measured":2015,"magnitude":11.4,"components":"AB","discoverer_code":"STF1007","separation_arcsec":14.6,"position_angle_deg":300},{"measured":2015,"magnitude":10,"components":"AC","discoverer_code":"STF1007","separation_arcsec":21.9,"position_angle_deg":244},{"measured":2016,"magnitude":7.74,"components":"AD","discoverer_code":"STF1007","separation_arcsec":67.7,"position_angle_deg":28}],"spectral_type":"A3","color_index_bv":0.199,"luminosity_solar":75.64844408332819,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","proper_motion_ra_mas_yr":-5.37,"proper_motion_dec_mas_yr":0.18},"designations":[{"catalog":"HD","designation":"HD 52155"},{"catalog":"HIP","designation":"HIP 33748"}],"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."}