{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T02:26:20.613Z","years_from_j2000":26.671,"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-56327","name":"HD 56327","class":"f2_yellow_white_star","category":"star","object_type":"F2 yellow-white star","mag":8.1,"mag_band":"V","abs_mag":2.384,"abs_mag_band":"V","distance_ly":453.6251394123788,"distance_method":"parallax","ra_deg":109.52283,"dec_deg":34.951689,"epoch_ra_deg":109.965619,"epoch_dec_deg":34.90315,"epoch_moved_arcsec":0.746,"pm_ra_mas_yr":-3.99,"pm_dec_mas_yr":-27.69,"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-56327","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07181+3457","companions":[{"measured":2017,"magnitude":9.96,"components":"AB","discoverer_code":"STF1054","separation_arcsec":18.5,"position_angle_deg":292},{"measured":2017,"magnitude":9.93,"components":"AC","discoverer_code":"STF1054","separation_arcsec":96.8,"position_angle_deg":274}],"spectral_type":"F2","color_index_bv":0.428,"luminosity_solar":9.69170083947291,"variable_mag_max":8.012,"variable_mag_min":8.212,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_temperature_k":6770,"proper_motion_ra_mas_yr":-3.99,"proper_motion_dec_mas_yr":-27.69,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 56327"},{"catalog":"HIP","designation":"HIP 35349"}],"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."}